i found this thing on the beach about 2 months ago ... i can't send you a pic but i'll try my best to describe it to you ... it looks like a human brain and it is soft like a sponge... i thought it was just a dead sponge so i put it in with the shells i was collecting and went on... when i got home i noticed ,to my suprise it was moving like it was trying to breath... don't know what it is but i felt bad for it and put it in the 130 gal tank... it moves through the water by taking in water and spitting it out ... when it finds where it wants to be it digs into the crushed coral and stays there for a while... it's alive but i have no idea what it is ... can you help me... please