ECHINOGOBIUS HAYASHII - (IWATA, HOSOYA & NIIMURA, 1998)
Picture courtesy of: Alain Daoulas
Actinopterygii (Gigaclass) > Actinopteri (Class) > Teleostei (Subclass) > Gobiiformes (Order) > Gobiidae (Family) > Gobiinae (Subfamily) > Echinogobius (Genus)
Cheekstreak goby, Cheek-streaked goby, Moyoushinobi-haze, モヨウシノビハゼ, 林氏荆鰕虎鱼,
Dorsal spines (total): 7, hard and pungent first dorsal spine of first dorsal fin, fifth spine forming short filaments; Dorsal soft rays (total): 12; Anal spine: 1; Anal soft rays: 12; Pectoral fin rays: 15-17 (usually: 16); Pelvic fin rays: I, 5; Upper and lower segmented caudal fin rays: 9 + 8; Upper and lower branched caudal fin rays: 7 + 6; Lateral scale rows: 29-32 (usually: 30); Transverse scale rows: 7-9 (usually: 8); Vertebrae: 10 + 16 = 26; Depth of body: 6.8-7.8 in SL. Body compressed, rather elongate. Dorsal profile from posterior of nape to middle of second dorsal fin straight. Head compressed. Eyes close-set in dorsal view. Mouth moderate, terminal, weakly inclined obliquely upward. Maxilla extending to below front of eye. Upper jaw with several series of conical teeth, outermost series largest; Two pairs of backwardlyhooked canine-like teeth anteriorly. Lower jaw with several series of conical teeth, outermost series largest, set outward with upwardly-curved tips; A pair of large backwardly-hooked canine-like teeth anteriorly, protruding outside lip. Tongue rounded, free from mouth floor. Anterior nostril with short tube, placed slightly anterior to midpoint of snout. Posterior nostril without tube, between anterior nostril and anterior edge of eye. A longitudinal groove holding a single pit line on dorsal and ventral side of anterior nostril and below eye on cheek, respectively. A transverse groove holding a single pit line below posterior nostril. Mental flap oblong with a pair of pit clusters on posterior margin. Anteroventral margin of gill opening reaching to point below middle of opercle. Isthmus narrow. Head, nape and pectoral fin base naked. All scales cycloid, posteriormost largest, breast and belly scales smaller than lateral scales. Origin of first dorsal fin slightly anterior to vertical line through pelvic fin origin, posterior end of basal membrane not reaching second dorsal fin, Origin of second dorsal fin above anus. Origin of anal fin beneath base of first ray of second dorsal fin. Pectoral fin rounded, posteriorly extending beyond vertical line through base of sixth spine of first dorsal fin when appressed. Pelvic fin sucking disk with complete frenum and connecting membrane, extending beyond vertical line through base of sixth spine of first dorsal fin when appressed. Caudal fin lanceolate, eighth branched soft ray longest. Max. length: 7.0 cm SL. Depth range: 1 - 20 m.
Body pale grey color grading to white ventrally; Presence of blue-edged red to pink band from occiput to cheek; Side of body with variable-sized brown spots on side of body and on dorsal and caudal fins; Some larger spots (on shoulder region and first dorsal fin) surrounded by small blue-white spots; Upper half of side of body and along base of second dorsal fin with scattered small blue-white spots.
Echinogobius: from Latin, echīnus = hedgehog, sea urchin + from Latin, gobius = gudgeon.
hayashii: in honor of Masayoshi Hayashi, Curator, Yokosuka City Museum, who collected the first specimens and gave it its Japanese name.
Original description: Echinogobius hayashii Iwata, Hosoya & Niimura, 1998 - Type locality: Ishigaki Bay, Ishigaki City, Okinawa Prefecture, Japan.
Western Pacific and southeastern Indian Ocean: Indonesia, north to Yaeyama Islands (Japan), south to northwestern Australia and New Caledonia.
Occurs on clear sandy bottoms with fast tidal currents.
Last update: 12, May 2022