So, I just put a smallish new decoritve rock in my oscar tank. Its smaller than a scotch-tape roll. Its mostly buried under gravel(safety measure). I put it in there, go sit down & suddenly I see my oscars swimming on their sides, & doing head stands. I was worried until I realized they were just trying to study the rock! Idk how they noticed it! Its halarious to watch them study it. Idk a fish would study things in such detail! They really want to know what this new thing is in their tank. Silly oscars! 
