A new goboid species, Quisquilius flavicaudatus, was found in the Red sea. D VI, I 8; A I 8; Ρ 16-17; LL 23-25; TR 6-7; PreD 6; GR 3 + 1 + 10; V I 5 partly fused by a delicate membrane. The caudal peduncle and caudal fins are yellow. Red spots are found on the head and on the front of the body. The new species is distinguished from the other Quisquilius species in the Western Indian Ocean and the Red Sea by having the lowest count of soft dorsal rays and scales in LL and PreD.