Range and Identity
Etropus microstomus is recorded from western Atlantic waters, including the eastern United States and northern Gulf of Mexico. Broad northern range entries should retain their collection locality rather than being used to imply equal abundance throughout the region.
Habitat and Behavior
The checked summary provides limited species-specific habitat detail. It does not establish one preferred bottom texture, exact depth or feeding list. Those gaps should not be filled by copying the ecology of a larger flounder merely because both fishes have flattened bodies.
Food and Life History
The reported maximum is thirteen centimeters total length. Reproduction is by egg laying, with pairing and multiple releases over a prolonged period. That description does not establish a universal calendar or one fixed number of eggs for every female.
Field Note
Include identification photographs, depth and coastal locality with a record. Small flatfishes can be difficult to distinguish, and a common name referring to mouth size does not replace diagnostic features.
All Lakes With Smallmouth Flounder
Browse all lakes and reservoirs with confirmed Smallmouth Flounder records in our database, listed alphabetically.
No published lakes are currently linked to this species in our confirmed records.