Tongue Eating Louse Facts Tongue Eating Louse Physical Description Despite its rather dramatic appearance, the Tongue Eating Louse remains a small creature, that also displays sexual dimorphism. Adult females attain an average length of roughly 1.1 in (29 mm), while males only reach a length of 0.55 in (14 mm). As an isopod, which constitutes a crustacean, […]