it has a soft shell
Soft shell crabs are soft and are eaten with the entire crab. Soft shell crabs are actually hard shell crabs that have shed their shells to allow for growth. Shells do not grow with the crab. Crabs retain a soft shell when they shed their hard shells; then that soft shells begins to harden-up as the crab grows.
The hard shell protects the very soft body of the mollusk.
Turtles
Yes an Oyster has a soft body inside a hard shell.
no, because it has a hard outer shell
Have a soft body with a hard outer shell
It depends on where you buy it from and if you are getting a hard or soft shell. I personally got a hard shell case for $100. A soft can cost about $60 or someplace in the teens depending on where you get it.
Mollusks have soft body and hard shells but some don't even have shells.
There are two ways, you can tell visually by seeing if there is any sign of wrinkles on the shell, and if you cant tell visually, then just lightly poke the shell. If it gives way a little bit, you know it has a soft shell.
you boil the egg in water and them peal the hard shell after about 10 minutes of boiling
Yes - they're composed of a soft membrane rather than a hard shell.