Meaning : A porous mass of interlacing fibers that forms the internal skeleton of various marine animals and usable to absorb water or any porous rubber or cellulose product similarly used.

Meaning : Someone able to acquire new knowledge and skills rapidly and easily.

Meaning : A follower who hangs around a host (without benefit to the host) in hope of gain or advantage.

Meaning : Primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework. Usually occurs in sessile colonies.

Meaning : Wipe with a sponge, so as to clean or moisten.

Meaning : Ask for and get free. Be a parasite.

Meaning : Erase with a sponge. As of words on a blackboard.

Meaning : Soak up with a sponge.

Meaning : Gather sponges, in the ocean.