Sea Bass Fish

Sea bass are rather perchlike fish. The more or less elongated body has small scales, the mouth is large, and the tail is generally straight-edged or rounded. The dorsal fin, a diagnostic feature, consists of a forward, spiny section and a hinder, soft-rayed section; the two portions are usually joined but may be separated by a notch.Sea bass are carnivorous, feeding on fish, crustaceans, mollusks, and other invertebrates. Some are active swimmers; others, such as the groupers, are more sedentary. Certain species, such as the belted sandfish (Serranellus subligarius) of Florida, are hermaphroditic (male and female reproductive organs in one animal). Others, such as the groupers, may mature as one sex and later change to the other.

Sea basses vary widely in size, from a few centimetres to a maximum of 2 metres (6 feet) and 225 kg (500 pounds) in such species as the goliath grouper (Epinephelus itajara) and 2.7 metres (9 feet) and 400 kg (900 pounds) in the giant grouper (E. lanceolatus). Colour also varies, both among and within species. Some sea basses, for example, are able to change to any of several colour patterns. In other species the young may be patterned differently from the adults, and in still others individuals inhabiting deeper waters may be considerably redder than those of the same species living near shore.

                                                                                        

Electric CatFish

Malapterurus Electricus

Malapteruridae is the only group of catfish with a well-developed electrogenic organ; however, electroreceptive systems are widespread in catfishes.The electrogenic organ is derived from anterior body musculature and lines the body cavity. Electric catfish do not have dorsal fins or fin spines. They have three pairs of barbels (the nasal pair is absent). The swim bladder with elongate posterior chambers, two chambers in Malapterrus and three in Paradoxoglanis.They can grow as large as 100 centimetres  and about 20 kilograms (44 lb) in weight.All Paradoxoglanis species are much smaller. Most malapterurids are dwarf species less than 30 cm (12 inches) long.

Sword Fish

Physical description:

Swordfish are large, agressive fish (up to 14 feet long and a weight of 1,200 pounds) with rounded bodies and long flattened snouts. The scientific name comes from the Greek and Latin words meaning "sword". They have been reported to attack men, boats, whales and submersibles. Identifying characteristics are the lack of pelvic fins and gill rakers, and the presence of a single lateral keel located on each side of the caudal peduncle. Marlins, spearfish and sailfish have two keels. Swordfish are brownish-black on the back and upper sides, fading to a pale brown on the lower sides and belly.

Biological description:

Swordfish are the most widely distributed billfish, occurring worldwide in all temperate, subtropical and tropical seas. Spawning takes place in tropical waters when fish are 5 to 6 years old or older. Females grow faster, larger and live longer than males. Swordfish are opportunistic feeders that forage from the bottom to the surface over great depths and distances on mackerel, squid barracuda, redfish and filefish.

Sea Robin Fish

  Sea Robin Fish

The large head, tapering body, and fanlike pectoral fins of the sea robin somewhat suggest a sculpin. But the robin is distinguished from all the sculpins by the incasement of its entire head in bony plates; by its smaller mouth; by the flat depressed dorsal profile of its snout; by its large ventral fins; and by the fact that the three lower rays of each of its pectoral fins are separate from the rest of the fin and modified into three independent feelers with slightly dilated tips, a very noticeable and distinctive feature. Furthermore, the front margin of the upper jaw is concave in outline when viewed from above, not convex as it is in most other fishes, which gives the nose of the robin a characteristic aspect. The head plates are rough and there is one sharp spine on each cheek at the angle of the gill cover; two short spines over each eye pointing backward; a spine on either side of the neck; and one on each shoulder above the base of the pectoral fin. The spiny and soft-rayed portions of the dorsal fin are separate, but they are so close together at their bases that they are almost in contact. The spiny dorsal has 10 spines, is rounded in outline, and higher than the soft dorsal (13 rays); but the soft dorsal is considerably longer than the spiny dorsal.

American Shad Fish

   American Shad Fish


Description: color of back green or greenish blue with silvery sides, white underneath (colors darken when fish enters fresh water to spawn); belly with scutes forming distinct keel; one or more dark spots in a row behind operculum; lower jaw with pointed tip that fits into v-shaped notch in upper jaw.