Species: Arcos rhodospilus, Rock clingfish

Arcos rhodospilus (Günther, 1864)

Rock clingfish

Tadpole shaped, with flattened body and wide flattened head; front nostril with wide, branched flap; a few fleshy lobes under chin, but nowhere else on head; top lip broad, much wider at front than at sides; top jaw with a row of rounded incisors and a deep patch of small irregular teeth behind them, no canines, lower jaw with 4-6 pairs of incisors at front followed on each side by 2-4 canines;sucker very large, front and rear parts with a broad band of papillae, central part with 2 close-set patches of papillae, 5-8 rows of flattened papillae across front of sucker disc, 7-9 rows across rear of disc, 5-7 longitudinal rows along each central patch; a conspicuous fleshy pad on pectoral fin base with free posterior margin; dorsal rays 6-7; anal rays 5-7; pectoral rays 20-22.