Eyes on stalks, a hard shell covering the back and other limbs, two front-positioned claws, 6 (?) legs.
A crab has an external hard shell, and is an invertebrate.
hard shells
Black widows external features are, they are black with a red hour glass on its back.
A horseshoe crab is an invertebrate. It lacks a backbone or spine, which are characteristic features of vertebrates.
The skeleton and shell of a crab are synonymous. What we'd call the shell of a crab is simply a component of its exoskeleton, the external covering arthropods use made out of a tough protein, chitin.
An Exoskeleton - external skeleton. Stops it getting omnomed
Thanksgiving
Some examples include: shrimp, crab, lobster, barncles, and prawns.
Mammals have several different external features that make them different from other animals. Some of these features include body hair or fur, external mammary glands, and warm-bloodedness.
Hermit crabs are often distinguished by their bright red coloring. Interestingly, the intensity of the red is influenced by what the crab eats.
morphology for plants
its an external scope