Cobia, Snook & Barramundi
The cobia, the only member of the Rachycentridae family, is a prized gamefish. It is also fished for commercially for its fine flesh but not here in Malaysia, which is often sold smoke.  Snook and barramundi belong to the Centropomidae family, which contains about 30 species. Some of the Centropomidae are exclusively marine, others are marine but move into brackish water and even into rivers; some live in rivers and spawn in brackish estuaries, while a few are found only in freshwater.
FISHING NOTES
Techniques
Cobia are usually taken by bottom fishing with lures or natural baits. Lure fishing is an effective technique for barramundi and for snook, which can also be taken on fly tackle. Here in Malaysia, nobody land cobia using fly tackle. If you got one please let me know.
   Tackle
For cobia, use a heavy spinning rod with 6.8 to 9.1 kg (15 to 20 lb) mono line and a 90 cm (3 ft) leader or wire or 27.2 to 36.3 (60 to 80 lb) mono, and hook sizes 2/0 to 4/0. Try a 1.8 m (6 ft) surfcaster with 4.54 to 5.4 kg (10 to 12 lb) mono when lure fishing for snook, and a fast, 2.7 m (9 ft) tip-action rod for fly fishing. For barramundi, use 2.7  to 3 m  (9 to 10 ft) spinning rod with 9.1 to 13.6 kg (20 to 30 lb) mono line.
   Baits
Good baits for cobia include natural baits such as fish, crabs, and shrimps, and artificial large plugs with bright blue or silver finishes, and 42 to 85 g (1 1/2 to 3 oz) jigs with yellow or white skirts. Try plugs, spoons, jigs, shrimps, streamer flies, and fish (especially kembong/mullet) for snook, and jointed, 15 cm (6 in) shallow-diving plugs for barramundi (I prefer Rapala brand).
Note: Cobia & Barramundi (Giant Perch)
This long, slim-bodied fish (Cobia) occurs in most warm seas, from coastal waters to the open ocean, but is not found along the Pacific coast of North America. It has a flat head, a large mouth with a slightly protruding lower jaw, and a first dorsal fin that consists of eight separate spines. Fish and crustaceans make up the bulk of its diet, and it grows to a weight of about 68 kg (150 lb). It is usually solitary but sometimes forms small schools.

The barramundi, or giant perch, lives in rivers, creeks, and mangrove swamps, and spawns in estuaries and coastal waters. It feeds on fish, crayfish, crabs, shrimps, and insects, and grows to a weight of 60 kg (132 lb); the closely related Nile perch, an African freshwater fish, can reach 91 kg (200 lb).