Lipogramma trilineata, the three-lined basslet, is a species of ray-finned fish from the family Grammatidae.

It is found in the western Atlantic Ocean from the waters off southeastern Florida south through the Bahamas into the Gulf of Mexico and the Caribbean Sea as well as the coasts of Central and South America from Quintana Roo, Mexico to Nicaragua, and the seas off Cartagena and those off Venezuela at Curaçao and Bonaire.

It has been recorded that in the Bahamas, there has been a near two-thirds decline in the biomass of fish which lionfish prey on over a period of two years.

[1] Lipogramma trileaneata has an elongated, compressed body with a large eye and short snout, the mouth sits at the front of the head, and it has teeth on its jaws, vomer and palatine bone.

There are three black-edged blue lines, one along the centre of the snout, through the forehead and the nape and one on each side from the eye to beneath the front of the dorsal fin.