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At sizes less than 50 cm, the giant trevally is a silvery-grey fish, with the head and upper body slightly darker in both sexes. [17] Fish greater than 50 cm show sexual dimorphism in their colouration, with males having dusky to jet-black bodies, while females are a much lighter coloured silvery-grey. [17]
The bigeye trevally is commonly found in large slow moving schools during the day, becoming active at night when it feeds, taking a variety of fish, crustaceans, cephalopods and other invertebrates. The fish is known to move from a more crustacean dominated diet as a juvenile to a nearly completely fish dominated diet as an adult.
After observing the 5-foot long eel, Jeremy concludes that the many attacks in Fiji were the work of both fish: the giant trevally at the river mouth and coastal regions, and the giant mottled eel in the inland sections. He also concludes that these fish were both practising their very easily agitated defensive behaviours.
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Caranx is a genus of tropical to subtropical marine fishes in the jack family Carangidae, commonly known as jacks, trevallies and kingfishes.They are moderate- to large-sized, deep-bodied fishes which are distinguished from other carangid genera by specific gill raker, fin ray and dentition characteristics.
The crevalle jack is a powerful, predatory fish, with extensive studies showing the species consumes a variety of small fish, with invertebrates such as prawns, shrimps, crabs, molluscs and cephalopods also of minor importance. Dietary shifts with both age, location and season have been demonstrated, which led some researchers to postulate the ...
A ‘hauntingly beautiful’ image of horseshoe crab and a beached orca taking its final breaths were among the winning images of the Wildlife Photographer of the Year 2023 competition.
The bluefin trevally is a large fish, growing to a maximum known length of 117 cm and a weight of 43.5 kg, [2] however it is rare at lengths greater than 80 cm. [8] It is similar in shape to a number of other large jacks and trevallies, having an oblong, compressed body with the dorsal profile slightly more convex than the ventral profile, particularly anteriorly.