Biologically speaking, they belong to the same order, but they belong to different families. Turtles belong to the family Trionyx, and turtles belong to the family Tortoise (we usually distinguish animals at the level of "family"). Generally speaking, they are not the same creature, so I will describe them in my own words and won't give you an encyclopedia. The turtle shell is arched and has a deep texture. The tortoise shell is flat, not arched, softer than the tortoise shell, and the texture is not obvious. The glans is round, the glans is pointed and the nose is long. Turtles have webbed feet (the kind with membranes on the feet of ducks). Turtles are fresh water, and turtles can live in the sea. Turtle's temperament is fierce, while turtle's temperament is mostly gentle. If you tease them with branches, the tortoise will bite hard, but the tortoise will generally shrink its head, and its shell is not as deep as the tortoise.

These are enough to distinguish turtles from turtles. As for nutrition, it should be that turtles have high nutrition. The simplest thing is that Guiling Decoction is always heard, but it is rarely heard. Except for the following points: turtle, turtle, tuanyu, turtle and salamander are all aliases of turtle, which refer to the same animal, and the meanings of these names are not different (salamander is a bit special).