Sparidae, eels, gobies? The goby is a toothed fish.

The picture below shows the red-spiked tiger fish red-toothed bat? Commonly known as Red eel and tiger fish

The body is slender, the side is flat and strip-shaped. Generally, it is 9 ~ 20cm long and weighs 20 ~ 35g g. Its eyes are small and degenerate, and it is buried under the skin. The mouth is large and oblique, and the mandible and chin protrude forward. The external teeth of the upper and lower jaws are 6 ~ 12 sharp curved teeth protruding from the lips, which are exposed when closed, like spikes, dorsal fins, caudal fins and gluteal fins connected into a whole. The pectoral fin is wide and long, the upper fin is free and filiform, and the body is bare and scaleless. All purple. The pectoral fins and ventral fins sometimes have dark brown edges.

Most of them are distributed in fresh water, brackish water and sea areas in warm areas, and inhabit muddy environments such as estuaries, bays, mangrove wetlands or sand banks. In Hong Kong and Vietnam, this kind of fish can be used as a delicacy on the table.