A turtle. and define what you are thinking is a "protective shell"
most box turtles
That's a tortoise.
Turtle
a turtle
Tortoise
An alligator
Lobster, Water beetles
Reptile eggs have a leathery or hard shell that protects them from moisture loss. Reptiles have scaly skin, which also protects them from moisture loss. This is why reptiles can live their lives on land while amphibians are largely tied to the water.
water horses are not proven real. but the scientists that believe in it think its a reptile that lives in water. sortof like a water snake.
crab, hermit crab, and lobsterHermit crab is a kind of crab, and it doesn't actually has its own shell. Oysters have shell and lives in water.
a salamander is a amphibian and lives part of it's life in the water, but a snake is a reptile and has scales.
it has a shell . it is green . it lives int the water . it eats . and it drink water.
turtle.
A creature, such as a lobster, shrimp or crab that has no backbone, a hard outer shell, and usually lives in the water.
reptile
It's not born in the water, so its not an amphibian. And its definetly not a bird or a mammal. It lays eggs and is cold blooded, lives on land.