Distinguishing features
The body of the bumpnose trevally is a silvery green-blue above, becoming more silvery white below, with a dark blotch present on the operculum. The spinous dorsal fin and the soft dorsal fin rays are black, while the anal fin is brownish, with the filaments and lobe often blackish. The caudal fin has black trailing and leading edges, and the pelvic fin is dusky to black. Juveniles often have 5 to 7 vertical crossbars on their sides.
The simplest identifying feature being the distinct break in the contour ('bump') of the interorbital region, which becomes more pronounced with increasing size. (Wikipedia)
Size
- Up to 32 cm (Total Length)
Depth range
- Up to 50 m
Synonyms
Distribution
©Atlas of Living Australia: Australian distribution
Distribution and habitat preferences
The bumpnose trevally is widely distributed in the tropical and subtropical regions of the Indian and west Pacific Oceans. In the Indian Ocean, the species ranges from South Africa, Madagascar and the Seychelles north along east Africa to Mozambique, but has no records further north until India and Sri Lanka. Its distribution extends into South East Asia, Indonesia, Papua New Guinea and northern Australia, with the species extending as far north as Japan and as far east as Samoa in the Pacific.
The bumpnose trevally is an inshore fish, rarely venturing to depths greater than 50 m. It inhabits sandy bays and beaches, and appears to be quite tolerant of turbid waters, often living in the dirty waters near river mouths. Despite this, it appears to have a fairly low tolerance to reduced salinities and is not found in estuaries themselves. (Wikipedia)
Diet
It is usually founds in small groups of two or more, swimming along beaches where they take prey which consists of shrimps, small crabs and fish. (Wikipedia)
