Black Molly and Similar Species
Poecilia sphenops
Got a photo? Identify fish instantly with the Fishby app.
Open the appSeveral fish can be confused with Black Molly. Here are the key differences.
Species often confused with {name}
Sailfin Molly
Poecilia latipinna / Poecilia velifera
Key differences: While Black Mollies can be bred from Sailfin Mollies, the key difference in the 'Sailfin' varieties is the significantly enlarged, sail-like dorsal fin in males. Black Mollies (P. sphenops derived) typically have a shorter, more rounded dorsal fin.
Lyretail Molly
Poecilia sphenops (ornamental variant)
Key differences: Lyretail Mollies are ornamental variants of Poecilia sphenops (or hybrids) characterized by an elongated, lyre-shaped caudal fin, which is not present in the standard Black Molly.
Black Guppy
Poecilia reticulata (ornamental variant)
Key differences: Black Guppies are much smaller, typically more slender, and males possess a highly ornate, often flowing caudal fin and sometimes dorsal fin, which is distinct from the more robust body and simpler finnage of the Black Molly.
Explore Black Molly
Identify fish anywhere
Free on iOS, Android, and Web. Photo identification, full species details, and more.