Starfish have an endoskeleton comprised of many little bones.
Since the term starfish encompasses a whole host of different creatures with different numbers of arms, I presume the answer isn't well defined. All the skeletons I've seen have a huge number of intricate bones, but I haven't seen that many.
Term bones doesn't 'easily' apply to the phylum echinodermata. What solid spines and plates they have are part of their skin, and what gives their bodies their rigidity is a 'water vascular system' or a Hydro-skeleton' or a 'pneumatic skeleton', which depends on water pressure to make it function.
4
Carapace - Main Part
Thorax - Head and upper body
Celphalothorax - Part joining the head and Middle section
Abdomen - The bottom part
Crayfish have 2 body segments: the cephalothorax and the abdomen
Lobsters have 20 segments.
It is common for sea stars to have 5
i think 5
five
a starfish is missing a few body parts like fins and tails
Yes, they have feet and mouths!
They don't.
They can regenerate body parts
starfish sponges sea cucumber others
Most likely 5
Certain animals have their body parts arranged around a central point. A starfish is a good example of this, which is known as radial symmetry.
A starfish has radial symmetry
it look like a star but can swim and looks very Polk a dotty.
Fragmentation is the ability to regrow body parts...like with a starfish, or worm. Only the worm will grow two butts, so the second half will die. But with the starfish as long as you cut through part of the nucleus (Middle) it will regrow the missing parts.
A radial body plan. Starfish and jellies are example of organisms with a radial morphology.
starfish have bumps and spines on their body