To survive
idoNTKNOW
Camouflage I think
No, sea sponges are not decomposers. Sponges are filter feeders.
Sponges protect themselves with spikes in their body.
they taste bad
chemical mechinism. REALEASING CHEMICALS IN THE WATER TO THE ATTACKER AND KILLS OR HURTS THE ATTACKER SO IT WILL EITHER DIE, OR GO AWAY.
With spicules and spongin
Sea Sponges hide from there predators by either camouflaging themselves or either not hiding at all.
They can't. That's why you don't put them in a tank with fish!
Yes, starfish do eat sea urchins. They wrap themselves around the sea urchin and evert their stomach against it to dissolve away the flesh and shell. Eventually when the flesh and shell is dissolved by the starfish stomach acids, the starfish eats the inside of the sea urchin.
they use their pineapple they live in :)