1, seahorse (Latin name: hippocampus), is the spiny fish order of the sea dragon family warm marine several species of small fish collectively, is a small marine animals, body length of 5 to 30 centimeters. Named for the head curved and the body at nearly right angles, the head is a horse's head and forms an angle with the body, the muzzle is long and tubular, the mouth is small, and there is one dorsal fin, which are all composed of flippers. The eyes can each move independently.

2, sea dragon (Syngnathus) also known as poplar fish, tube mouth fish. It is a kind of bony fish, which is categorized into one family in the zoological classification - Hylidae. Sea dragon family has about 150 kinds of species, also said 200 species. There are 25 species of sea dragons in China. Sea dragons are related to seahorses.

3, sharks belong to the vertebrate phylum Chondrichthyes (Chondrichthyes) plate gill subclass, marine, a few species into freshwater, for a group of fast swimming speed of medium and large marine fish. Shark endoskeleton is composed entirely of cartilage, often calcified, but without any real bone tissue, the exoskeleton is not very developed or degraded, the body is often dermatodont (plasmalemma), dental diversity, with hard muscle.

4, bass generally refers to the perch. Perch (scientific name: Lateolabrax maculatus) is a true perch family, perch genus fish. The body is long and laterally compressed. The mouth is large and sloping. The lower jaw is longer than the upper jaw, and the maxilla is long and ends to the lower edge behind the eye. The two enacting, pyriform, and palatine bones are fuzzy-toothed.

5, grouper refers to the perch order grouper family grouper subfamily fish. The grouper belongs to the order Spoke-finned fishes, with a fat body and a large mouth, and is not suitable for long and rapid swimming. Grouper are quite large, up to a meter or more in length, and it is not surprising that they weigh more than a hundred kilograms.