This fish reaches in
total length and has a maximum published weight of . It has an extremely large mouth, earning it the name
Pac-Man catfish.
L. alexandri is a sedentary species. This species has adhesive
eggs and the male displays parental care.
L. alexandri represents an example of
parallel evolution, sharing a similar morphology and lifestyle to species of the distantly related
Chaca catfish. ==Relationship to humans==