On the surface of a starfish you will find spines used for protection as armor, dermal gills surrounded the spines, a central disk, madreporite, arms and an anus. Underneath tubed feet used for movement, mouth, ambulacral grooves, and its mouth.
no
There are many starfish that are poisonous, such as the Crown of Thorns starfish, the sun star starfish, the spiny sun star starfish and the leather star starfish. Starfish have sharp spikes that are covered with a thin, venomous skin, which can cause swelling, nausea and vomiting once it is on your skin.
used for breathing. they stickout through bony spines on the starfish.
starfish's skintextures can very, they are usually soft and smooth but can be rough at times.
hard and bumpy
Skin
Their skin is covered with bumpy gills.
Starfish are cnidarians. They have spiny skin, some have nematocysts (stinging cells) and are generally toxic.
echinoderms which means (spiny skin)
The orange starfish is not poisonous. This star fish is sometimes called a red starfish. The color can vary from orange to red.
As an adaptation, starfish have saponins in their body walls, which are very unpleasant tasting to predators. Tropical species of starfish also have armor and spines as their protection. And thirdly, starfish have the ability shed and regenerate their limbs.