Collected from a narrow reef flat, the sandy slope with patches of corals and a rocky wall of about 3 m with small caves and shelters, and the slope began at depths of 8-10 m. The holotype was captured on sand at the base of coral at a depth of 8 meters .
Dorsal spines (total): 6; Dorsal soft rays (total): 13; Anal spines: 1; Anal soft rays: 12; Vertebrae: 26. This species is distinguished by the following set of characters: no head pores; no scales; D1 V; dorsal- and anal-fin rays branched and at least some pectoral-fin rays are branched; pelvic fin with a spine and five unbranched rays .: elongated; Cross section: oval.
Behavioural data for Gymnoxenisthmus Tigrellus is currently being reviewed.
Marine; pelagic-neritic; depth range 8 - 10 m . Tropical Indian Ocean: Red Sea.
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