Pontinus tentacularishas an oval shaped compressed, body with a compressed head with a large mouth. The body has a depth which is just over a quarter of its standard length. There are well developed spines on the head and there are elongated supraorbital tentacles. The dorsal fin has 12 spines and 9 soft rays, the soft rayed part of the dorsal fin is rounded, The anal fin has 3 spines and 5 soft rays. The caudal fin is rounded. The colour is brown with darker and lighter shading with 5 dark saddlemarks along the back but these do not extend onto the dorsal fin. The fins are light brown and the supraorbital tentacle is blackish.
Distribution and habitat
Pontinus tentacularis is found in the Indian Ocean from the Réunion and Mauritius east to the Philippines in the western Pacific Ocean. It is a marine demersal fish which lives at depths between. This species occurs over seamounts and knolls.