1. Frog, an amphibian belonging to Chordata, Amphibia, Anura and Ranidae, has an adult tailless, eggs are laid in water, hatch into tadpoles, and breathe through gills. After mutation, adults mainly breathe through the lungs and skin;
2, snakes, snakes have slender limbs, no movable eyelids, no ear holes, no limbs, no forelimbs, and the body surface is covered with scales. Snakes are warm-blooded animals with lower body temperature than humans, also called cold-blooded animals;
3. Misgurnus anguillicaudatus can be eaten fresh or dried after fishing, and can also be eaten and used as medicine. Misgurnus anguillicaudatus, known as "ginseng in water", lives in lakes and swamps and is a fish with high nutritional value, which is different from other fish.
4, crab, crab tail is different from other decapods, curled under the chest, and the carapace is usually wide. The first pair of pectoral feet are specialized as pincers, and often move by walking or crawling.