This specimen was caught in a mid-water trawl near the confluence of the Sacramento and San Joaquin Rivers by USFWS's Delta Juvenile Fish Monitoring Program.
Sacramento Blackfish are a rare catch in mid-water trawls used by the USFWS's Delta Juvenile Fish Monitoring Program.
This is one of the most common native cyprinid species caught in mid-water trawls by the USFWS's Delta Juvenile Fish Monitoring Program.
This East Asian smelt was introduced to the Sacramento–San Joaquin River Delta in the 1950's as a forage species for native trout. They are now considered a threat to the endangered delta smelt due to their ability to hybridize. This specimen was caught during the USFWS's Enhanced Delta Smelt Monitoring Program.