Lonely clingfish (Gobiesox marijeanae) is a ray-finned fish of the family Gobiesocidae. It inhabits marine (saltwater) waters in benthic environments. This species can reach a maximum total length of 5.4 cm. With a trophic level of 3.2, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Data Deficient on the IUCN Red List.
Dorsal spines (total): 0; Dorsal soft rays (total): 17 - 20; Anal spines: 0; Anal soft rays: 10 - 12. Poor development of papillae on head; margin of upper lip smooth; dorsal origin much closer to upper pectoral base than to caudal base; anus located much closer to anal fin origin than to rear margin of disc and under 8th dorsal ray; eye 1.2 (1.0-1.4) in bony interorbital space and 5.6 (4.7-7.3) in head; tip of depressed anal fin extends well posterior (about an eye's diameter) to that of the depressed dorsal fin .: elongated.
Behavioural data for Lonely clingfish is currently being reviewed.
Marine; demersal. Tropical Central Pacific: San Juanito Island (Tres Marias Islands, Mexico).
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