Species: Arcos nudus, Padded clingfish

Arcos nudus (Linnaeus, 1758)

Padded clingfish

Tadpole shaped, with flattened body and wide flattened head; a few fleshy lobes under chin, but nowhere else on head; front nostril with a large branched skin flap; top lip broad, much wider at front than at sides; top jaw with a  deep patch of irregular incisors at front, no canines or conical teeth behind; lower jaw with incisors at front, then 1 large canine then 4 small conical teeth behind those on side; 1 dorsal fin, at rear, no spines, 7-8; anal fin 6-7, like dorsal fin and under it; pectoral fin 23-25, lower 5-7 rays not markedly reduced in size; sucker very large, front and rear parts with a broad band of papillae, central part with 2 close-set patches of papilla; a conspicuous fleshy pad at base of pectoral fin; no scales; lateral line present as pores on head only.