owww, did a little research and here is what i found
"Some sea cucumbers have a commensal fish known as the pearl fish (Carpus sp.) which lives inside their anus during the day and emerges at night to feed. When morning comes, it simply waits for the anus to open as the sea cucumber breathes, and swims back inside.
Pearlfish are highly modified eel-like fishes which lack scales and pelvic fins. Most live in the body cavities of sea cucumbers, giant clams and pearl oysters during the day, leaving at night to feed on small fishes and shrimp. Pearlfish enter the body cavities of sea cucumbers through their anus. When it tries to enter the body cavities of the sea cucumber it closes its anus, but as sea cucumbers breathe through their anus it must eventually open and in swims the pearlfish. Juvenile pearlfish are parasitic, feeding upon the gonads of sea cucumbers."
Hope you have none of these critters. Kinda cool though all at the same time. They say it is a symbiotic relationship but i dont see what the sea cucumber gets out of it or how it could enjoy it, any thoughts?
