Jacksmelt and Similar Species
Atherinopsis californiensis
Got a photo? Identify fish instantly with the Fishby app.
Open the appSeveral fish can be confused with Jacksmelt. Here are the key differences.
Species often confused with {name}
Topsmelt
Atherinops affinis
Key differences: Topsmelt are generally smaller (rarely exceeding 30 cm), have a more compressed body, and their two dorsal fins are closer together, often appearing almost continuous. The mouth of the Topsmelt is slightly superior (upturned), whereas the Jacksmelt's mouth is terminal. Topsmelt also tend to have a more greenish-yellow hue dorsally.
Grunion
Leuresthes tenuis
Key differences: Grunion are much smaller (typically 12-15 cm), have a more slender body, and are famous for their unique spawning behavior on sandy beaches. Their dorsal fins are also widely separated, but their overall size and reproductive strategy easily distinguish them from Jacksmelt.
California Grunion
Leuresthes tenuis
Key differences: California Grunion are significantly smaller (max 18 cm), have a more slender body, and a smaller head. Their spawning behavior (running up beaches to lay eggs) is unique and not shared by Jacksmelt. The silver stripe on Grunion is also typically narrower and less prominent than on Jacksmelt.
Explore Jacksmelt
Identify fish anywhere
Free on iOS, Android, and Web. Photo identification, full species details, and more.