The perfect nano blenny! The spinyhead blenny has a mottled black, white and red coloration over the entire body, which is rather elongated. As with most blennies, the head of this animal has small, hair-like appendages over the eyes, which are large and red. The dorsal fin has 20 to 22 spines and 13 to 16 soft rays. The anal fin has two spines and 21 to 25 soft rays. It grows to a total length of 2.8 cm (1.1 in).