Yeah, first time I saw the fish, I thought it looks like Barracuda too.
As per clarification by Prawn Star,and googled, found these fish are similar, but different.
-FYI, explanation By Steve Starling, quoted from sports fish site.
This slim, needle-toothed fish is usually dark, steely-blue or green along the top of the back and bright, metallic silver on the flanks and belly. There is a distinct black patch near the leading edge of the long, relatively high first dorsal fin. The forked tail is dark, often black. Barracouta are sometimes confused with the tropical barracuda
Barracuda have steely grey or dark green backs and their silvery flanks carry between 18 and 24 faint, vertical stripes or bars when alive or freshly killed. There are often irregular dark blotches on the fish's sides, mainly towards the tail. The scalloped tail fin is sometimes tinged with yellow or edged in black. Although barracuda are sometimes confused with the southern barracouta, the two are totally unrelated and have little in common beyond their superficial physical similarities.