I have a 15/14g 24" tank, a couple of pieces of decor (x2 bogwood x2 rocks). And my stock is in sig. A tetra (neon) is missing, now their are only four neons left. Ive looked all over the tank and its not their, or any sign of it. I believe it was eaten, but by what? (ive recently added a cameroon shrimp, and its already injured my plec could this have done this)?