Fluorescent Purple Vase Sponge is a very rare type of sponge.
The rarest type of coral is the Elkhorn coral.
Well, the sponge does not have a specific genus. However, any species of a sponge has a genus so find a specific type of sponge, then search the sponge name for example "What is the genus of a barrel sponge?" ______Lucas
No it isn't. The rarest is AB negative.
The rarest you can get is groudon who is a fire-machine type pokemon.
It depends on the type of sponge.
a sponge skeleton
normal
iregular
It is a type of sponge
The rarest type of blood is O. people with O type blood can donate blood to anybody and there are very few people that have this blood type. It is extremely rare.
...The Purple Rose!
The Gem Tang!