Gertrude's Rainbowfish and Similar Species
Pseudomugil gertrudae
Got a photo? Identify fish instantly with the Fishby app.
Open the appSeveral fish can be confused with Gertrude's Rainbowfish. Here are the key differences.
Species often confused with {name}
Forktail Blue-eye
Pseudomugil furcatus
Key differences: P. furcatus lacks the distinct black spots on the body and fins. Its caudal fin is typically yellow with black margins, and the dorsal and anal fins are also yellow, without the spotted pattern of P. gertrudae. Males of P. furcatus have more pronounced, deeply forked caudal fins and often more intensely yellow finnage.
Popondetta Blue-eye
Pseudomugil connieae
Key differences: P. connieae generally has a more subdued coloration and lacks the prominent black spots characteristic of P. gertrudae. Its fins are typically clear or faintly colored, and the body is often a silvery-blue. The fin extensions in males are less dramatic than in P. gertrudae.
Pacific Blue-eye
Pseudomugil signifer
Key differences: P. signifer is generally larger and more robust than P. gertrudae. While it can exhibit some spotting, it is typically less dense and distinct than in P. gertrudae. The finnage of male P. signifer is often more elongated and filamentous, but the overall body pattern and spot distribution differ.
Explore Gertrude's Rainbowfish
Identify fish anywhere
Free on iOS, Android, and Web. Photo identification, full species details, and more.