Salamander
Salamanders have a long tail, and their eyesight is relatively poor, so they only eat live bait when catching food. The body length of an adult salamander is approximately 61 to 155 mm. Their skin is relatively smooth with small warts and weak spines.
The salamander is composed of 5 parts: head, neck, body, hands, feet and tail. The head of the salamander is flat, the tongue is small, thick, and oval, with the front and rear ends connected with the mucosa at the bottom of the mouth. The hands and feet are thin and the fingers and toes are not webbed; the tail is flattened laterally. The male anus is fat and enlarged, and the anal fissures are large; the female anus has a mound-like bulge and short anal fissures. The neck of the salamander is not obvious, the body is flat, the hands and feet are relatively developed, the forelimbs have four fingers, the hind limbs have five toes, there are no webs between the fingers (toes), and the tail is flat and long.
The vomer bone teeth of the salamander are "∧" shaped, the lip folds are more obvious, there is one premaxilla, and there is no bone seam in the center of the nasal process; the maxilla and pterygoid are both short and far apart. The basoglossal cartilage has 1 pair of finger-like processes, 2 pairs of ceratobranchial bones are all ossified or only 1 pair is ossified, and only 1 pair of epibranchial bones are ossified. The larvae have stable branches, 3 pairs of external gills, and are feathery; the caudal dorsal fin fold starts from the front of the body, and the fin fold is short and straight. Salamanders are short in stature, have 4 legs, and have moist skin. Most of them have translucent colors and conspicuous appearances. The overlord salamander is the largest, with a body length of up to 2.3 meters.
Salamanders have tails and are similar in shape to lizards, but have no scales. Unlike frogs, it has a long tail throughout its life. Its limbs are not developed, and adults can be divided into aquatic, terrestrial and semi-aquatic categories. Aquatic species typically lay eggs in the water, while terrestrial species typically return to the water to lay eggs when they grow. A small number of species lay eggs in moist continents. After laying eggs, the larvae will develop and grow in the water.
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