Species: Microdesmus intermedius, Long-tailed worm-goby

Microdesmus intermedius Meek & Hildebrand, 1928

Long-tailed worm-goby

Slender, wormlike, body height 3-9% of SL; tail (without fin) 61-70% of TL; head deep; eyes tiny, high on side of head, skin covered; pores on cheek form a faint X; snout blunt and square, lower jaw only a little projecting; lips thick, with fleshy folds, flanges at sides of corner of mouth; teeth small, conical, close-set in 2 irregular rows; gill opening large (not tubular), longer than base of pectoral; dorsal fin spines evenly spaced, 66-68 elements, origin over rear ½ of pectoral; anal II, 43-49; pectoral 12 (10-14) rays; pelvics I, 3, shorter than pectorals; tail fin rounded, short; dorsal and anal fins confluent with tail fin; scales small, non-overlapping, well separated; body and head scaly except for snout and lower jaw; scales with 31 radiating ridges.