The armour of a starfish feels very rough but once you have the starfish on your hand there are little tentacle with suction cups on the end that will stick on your hand and it will tickle a little bit.
gayness
Starfish do not have eyes, but because they have many arms/legs/limbs, they can feel the world around them and have adapted to live without the ability to see.
The bodies of starfish feel slightly course to the touch. They are not soft in the way that a sponge is soft, but they are flexible enough that they bend when touched. Starfish have many legs and can even re-grow a body part when it is removed.
they are made when starfish are fossilized and dug out of the ground. feel free to correct me if this is not what you want.
there are cusion starfish, reef starfish, spiny starfish and fire brick starfish in new zealand.
It is called toilet water.
Other animals cannot inform us of how they feel, nor of why they feel that way. We do not even know that they have 'feelings', but - having them ourselves - we think thay might. ----- Ooooops ----- It appears that I misunderstood the questioner's use of the word "feel".... they meant to the touch, and not emotionally. All I can say is that the few I encountered as a child on the Atlantic coast of Ireland were more firm than a fish, but less firm than a crab or lobster. They also had a rough texture, a bit like sandpaper. But that is not exactly a scientific sample - about a dozen starfish in the middle of the 1950s in one bay. :-)
when they feel like it
Yes they can
Sure, starfish larvae are planktonic. Adult starfish are not.
Starfish Ancestors
they are starfish that is spiny