after doing some research i found out that it was actualy a male and its a part of its body.

but to a rookie like me it looks like the back end of a baby
-----
4", 8" common pleco
9" vampire pleco
13" iredescent "shark"
12" typhlonectes natans
1" albino clawed frog
2" spotted cory
lots of guppies for t.natans food