Delta Smelt Releases
Data Courtesy of USFWS San Francisco Bay-Delta Fish & Wildlife Office
| Date | Location | ~Days post hatch | Release Method | Adipose Fin Clipped | VIE Tagged | VIE Color and Position | Total Released | Description |
|---|---|---|---|---|---|---|---|---|
| 2026-11-10 | Sacramento River at Rio Vista | >200 | Hard Release (fish truck) | 0% | 0% | 37372 | On 2026-11-10, the USFWS will truck approximately ~37372 brood year 2026 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2026-11-09 | Sacramento River at Rio Vista | >200 | Hard Release (fish truck) | 0% | 0% | 35156 | On 2026-11-09, the USFWS will truck approximately ~35156 brood year 2026 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2026-06-02 | Sacramento River at Sherman Island | 120 | Fish Transport tank | 0% | 0% | 4000 | On 2026-06-02, the USFWS will truck approximately ~4000 brood year 2026 Delta Smelt from the FC&CL to Sacramento River at Sherman Island for release into the Delta. This release will include 0% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2026-04-03 | Sacramento River at Sherman Island | 40 | Plastic bags | 0% | 0% | 8142 | On 2026-04-03, the USFWS will truck approximately ~8142 brood year 2026 Delta Smelt from the FC&CL to Sacramento River at Sherman Island for release into the Delta. This release will include 0% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2026-04-01 | Sacramento River at Sherman Island | 40 | Plastic bags | 0% | 0% | 34796 | On 2026-04-01, the USFWS will truck approximately ~34796 brood year 2026 Delta Smelt from the FC&CL to Sacramento River at Sherman Island for release into the Delta. This release will include 0% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2025-12-16 | Sacramento River at Rio Vista | >200 | Hard Release (fish truck) | 0% | 0% | 24606 | On 2025-12-16, the USFWS will truck approximately ~24606 brood year 2025 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2025-12-03 | Belden’s Landing boat ramp in Suisun Marsh | >200 | Hard Release (fish truck) | 0% | 0% | 35298 | On 2025-12-03, the USFWS will truck approximately ~35298 brood year 2025 Delta Smelt from the FC&CL to Belden’s Landing boat ramp in Suisun Marsh for release into the Delta. This release will include 0% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2025-12-02 | Belden’s Landing boat ramp in Suisun Marsh | >200 | Hard Release (fish truck) | 0% | 0% | 35862 | On 2025-12-02, the USFWS will truck approximately ~35862 brood year 2025 Delta Smelt from the FC&CL to Belden’s Landing boat ramp in Suisun Marsh for release into the Delta. This release will include 0% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2025-11-05 | Belden’s Landing boat ramp in Suisun Marsh | >200 | Hard Release (fish truck) | 0% | 0% | 34551 | On 2025-11-05, the USFWS will truck approximately ~34551 brood year 2025 Delta Smelt from the FC&CL to Belden’s Landing boat ramp in Suisun Marsh for release into the Delta. This release will include 0% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2025-11-04 | Belden’s Landing boat ramp in Suisun Marsh | >200 | Hard Release (fish truck) | 0% | 0% | 33032 | On 2025-11-04, the USFWS will truck approximately ~33032 brood year 2025 Delta Smelt from the FC&CL to Belden’s Landing boat ramp in Suisun Marsh for release into the Delta. This release will include 0% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2025-02-03 | Sacramento River at Rio Vista | >200 | Hard Release (fish truck) | 0% | 100% | Left Side. Red. Anterior Dorsal | 16520 | On 2025-02-03, the Experimental Release Technical Team will truck approximately ~16520 brood year 2024 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2025-01-27 | Sacramento River at Rio Vista | >200 | Hard Release (fish truck) | 0% | 100% | Right Side. Green. Posterior Dorsal | 24504 | On 2025-01-27, the Experimental Release Technical Team will truck approximately ~24504 brood year 2024 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2025-01-22 | Lookout Slough near Shag Slough | >200 | Hard Release (fish truck) | 0% | 100% | Right Side. Red. Posterior Dorsal | 25226 | On 2025-01-22, the Experimental Release Technical Team will truck approximately ~25226 brood year 2024 Delta Smelt from the FC&CL to Lookout Slough near Shag Slough for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2025-01-08 | Lookout Slough near Shag Slough | >200 | Hard Release (fish truck) | 0% | 100% | Right Side. Blue. Posterior Dorsal | 10024 | On 2025-01-08, the Experimental Release Technical Team will truck approximately ~10024 brood year 2024 Delta Smelt from the FC&CL to Lookout Slough near Shag Slough for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2024-12-18 | Sacramento River at Rio Vista | >200 | Hard Release (fish truck) | 100% | 0% | 20219 | On 2024-12-18, the Experimental Release Technical Team will truck approximately ~20219 brood year 2024 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 100% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2024-12-09 | Lookout Slough near Shag Slough | >200 | Hard Release (fish truck) | 0% | 100% | Left Side. Orange. Anterior Dorsal | 14880 | On 2024-12-09, the Experimental Release Technical Team will truck approximately ~14880 brood year 2024 Delta Smelt from the FC&CL to Lookout Slough near Shag Slough for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2024-11-18 | Lookout Slough near Shag Slough | >200 | Hard Release (fish truck) | 0% | 100% | Left Side. Blue. Anterior Dorsal | 13573 | On 2024-11-18, the Experimental Release Technical Team will truck approximately ~13573 brood year 2024 Delta Smelt from the FC&CL to Lookout Slough near Shag Slough for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2024-01-31 | Sacramento River at Rio Vista | >200 | Hard Release | 0% | 100% | Left Side. Red. Posterior Dorsal | 6576 | On 2024-01-31, the Experimental Release Technical Team will truck approximately ~6576 brood year 2023 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2024-01-30 | Sacramento River at Rio Vista | >200 | Soft Release | 0% | 100% | Right Side. Red. Anterior Dorsal | 6581 | On 2024-01-30, the Experimental Release Technical Team will truck approximately ~6581 brood year 2023 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2024-01-24 to 2024-01-25 | Sacramento River at Rio Vista | >200 | Soft Release | 0% | 100% | Right Side. Orange. Anterior Dorsal | 6396 | On 2024-01-24 to 2024-01-25, the Experimental Release Technical Team will truck approximately ~6396 brood year 2023 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2024-01-24 | Sacramento River at Rio Vista | >200 | Hard Release (carboy) | 0% | 100% | Left Side. Orange. Posterior Dorsal | 6382 | On 2024-01-24, the Experimental Release Technical Team will truck approximately ~6382 brood year 2023 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2024-01-10 | Sacramento River at Rio Vista | >200 | Hard Release (fish haul truck) | 100% | 0% | 25649 | On 2024-01-10, the Experimental Release Technical Team will truck approximately ~25649 brood year 2023 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 100% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2023-12-20 | Sacramento River at Rio Vista | >200 | Hard Release (trailer) | 0% | 100% | Left Side. Green. Posterior Dorsal | 6261 | On 2023-12-20, the Experimental Release Technical Team will truck approximately ~6261 brood year 2023 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2023-12-19 | Sacramento River at Rio Vista | >200 | Hard Release (carboy) | 0% | 100% | Right Side. Green. Anterior Dorsal | 6430 | On 2023-12-19, the Experimental Release Technical Team will truck approximately ~6430 brood year 2023 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2023-12-13 to 2023-12-14 | Sacramento River at Rio Vista | >200 | Soft Release (carboy) | 0% | 100% | Right Side. Blue. Anterior Dorsal | 6581 | On 2023-12-13 to 2023-12-14, the Experimental Release Technical Team will truck approximately ~6581 brood year 2023 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2023-12-12 | Sacramento River at Rio Vista | >200 | Hard Release (carboy) | 0% | 100% | Left Side. Blue. Posterior Dorsal | 6508 | On 2023-12-12, the Experimental Release Technical Team will truck approximately ~6508 brood year 2023 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2023-11-15 | Sacramento River at Rio Vista | >200 | Hard Release (large scale) | 0% | 100% | Left Side. Green. Anterior Dorsal | 14104 | On 2023-11-15, the Experimental Release Technical Team will truck approximately ~14104 brood year 2023 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2023-01-25 | Sacramento Deepwater Ship Channel | >200 | Hard Release | 0% | 100% | Left Side. Orange. Anterior Dorsal | 6755 | On 2023-01-25, the Experimental Release Technical Team will truck approximately ~6755 brood year 2022 Delta Smelt from the FC&CL to Sacramento Deepwater Ship Channel for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2023-01-24 to 2023-01-26 | Sacramento Deepwater Ship Channel | >200 | Soft Release | 0% | 100% | Right Side. Green. Posterior Dorsal | 6240 | On 2023-01-24 to 2023-01-26, the Experimental Release Technical Team will truck approximately ~6240 brood year 2022 Delta Smelt from the FC&CL to Sacramento Deepwater Ship Channel for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2023-01-18 to 2023-01-19 | Sacramento River at Rio Vista | >200 | Hard Release | 0% | 100% | Right Side. Orange. Posterior Dorsal | 14524 | On 2023-01-18 to 2023-01-19, the Experimental Release Technical Team will truck approximately ~14524 brood year 2022 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2023-01-18 | Sacramento River at Rio Vista | >200 | Trailer Release | 100% | 0% | 3046 | On 2023-01-18, the Experimental Release Technical Team will truck approximately ~3046 brood year 2022 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 100% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2022-11-30 | Sacramento River at Rio Vista | >200 | Hard Release | 0% | 100% | Left Side. Red. Anterior Dorsal | 6556 | On 2022-11-30, the Experimental Release Technical Team will truck approximately ~6556 brood year 2022 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2022-11-29 to 2022-11-30 | Sacramento River at Rio Vista | >200 | Soft Release | 0% | 100% | Right Side. Blue. Posterior Dorsal | 6584 | On 2022-11-29 to 2022-11-30, the Experimental Release Technical Team will truck approximately ~6584 brood year 2022 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include 0% Adipose fin clipped individuals and 100% Visible Implant Elastomer tagged individuals. |
| 2022-02-16 to 2022-02-17 | Sacramento Deepwater Ship Channel near channel marker 53 | >200 | 100% | 0% | Red | 10933 | On 2022-02-16 to 2022-02-17, the Experimental Release Technical Team will truck approximately ~10933 brood year 2021 Delta Smelt from the FC&CL to Sacramento Deepwater Ship Channel near channel marker 53 for release into the Delta. This release will include 100% Adipose fin clipped individuals and 0% Visible Implant Elastomer tagged individuals. | |
| 2022-02-09 to 2022-02-10 | Suisun Marsh-Montezuma Slough at Belden's Landing | >200 | ~99% | ~1% | Red | 12800 | On 2022-02-09 to 2022-02-10, the Experimental Release Technical Team will truck approximately ~12800 brood year 2021 Delta Smelt from the FC&CL to Suisun Marsh-Montezuma Slough at Belden's Landing for release into the Delta. This release will include ~99% Adipose fin clipped individuals and ~1% Visible Implant Elastomer tagged individuals. | |
| 2022-02-03 | Sacramento Deepwater Ship Channel | >200 | ~56% | ~44% | Red | 6400 | On 2022-02-03, the Experimental Release Technical Team will truck approximately ~6400 brood year 2021 Delta Smelt from the FC&CL to Sacramento Deepwater Ship Channel for release into the Delta. This release will include ~56% Adipose fin clipped individuals and ~44% Visible Implant Elastomer tagged individuals. | |
| 2022-01-11 to 2022-01-12 | Sacramento River at Rio Vista | >200 | ~97% | ~3% | Red | 12800 | On 2022-01-11 to 2022-01-12, the Experimental Release Technical Team will truck approximately ~12800 brood year 2021 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include ~97% Adipose fin clipped individuals and ~3% Visible Implant Elastomer tagged individuals. | |
| 2021-12-14 to 2021-12-15 | Sacramento River at Rio Vista | >200 | ~89% | ~11% | Red | 12800 | On 2021-12-14 to 2021-12-15, the Experimental Release Technical Team will truck approximately ~12800 brood year 2021 Delta Smelt from the FC&CL to Sacramento River at Rio Vista for release into the Delta. This release will include ~89% Adipose fin clipped individuals and ~11% Visible Implant Elastomer tagged individuals. |