The adult fish is about10 ~17cm long. It has a long oval shape, a thick round head, a pair of big protruding eyes, black pupils, and can also be blue and green. The body surface is smooth and scale-free. The fin is translucent, without ventral fin, and the tail stalk is vertically flat and fan-shaped. They swim only by pectoral fins and short dorsal fins and anal fins. Each fin has a fast flapping speed, but it is not good at swimming speed.
About the pectoral fin as the boundary, the skin above (including the back) is golden (green) luster, and there are black circular spots staggered in the middle, similar to leopard print. The skin below (including the abdomen) is pure white. There is a particularly bright gold (fluorescent green) on the forehead. The depth of body color in water will change with mood or health.
Extended data:
A dinghy is a kind of mini squid that lives in tropical steam waters. The so-called "steam water area" refers to the estuary of the river, which is the dividing line between freshwater fish and marine fish. Every day, because of the inflow of river water, the tide of seawater and the proportion of water in steam water area are constantly changing. The waters with specific gravity between1.002 ~1.018 can be called steam waters.
The average fish can't stand this drastic change in specific gravity (osmotic pressure), so there are not many fish in the estuary. Small boats have an innate ability to resist osmotic pressure, which is beyond the reach of ordinary fish.
This ability allows the ship to shuttle freely between fresh water, soda water and seawater without any restrictions. However, from the perspective of feeding environment, it is still necessary to simulate soda water in the growing environment. If the boat is kept in fresh water or seawater for a long time, it will slowly lose its vitality and even die soon.