[2] This fish reaches 72 cm (2.36 ft) in total length and has a maximum published weight of 5 kg (11 lb).

[1] It has an extremely large mouth, earning it the name Pac-Man catfish.

[2] This species has adhesive eggs and the male displays parental care.

[2] L. alexandri represents an example of parallel evolution, sharing a similar morphology and lifestyle to species of the distantly related Chaca catfish.

[3] L. alexandri is considered threatened by Brazil's Ministry of the Environment.