Yup, they sure are---nothing seems to phase them!
Actually, I'm a little concerned about their housing situation in the 38 gal. tank with my firemouth pair (well, hopefully they'll pair whenever the female decides to be ready to spawn) and my two plecos...
You see, there are 4 spotted raphaels (all around the 2-3" mark), and 2 similar-sized fancy plecos (one's a leopard frog pleco, and the other is a peppermint pleco). Even though all the bottomdwellers are about the same size, I'm worried that the plecos may not be getting enough food. Those dang raphael cats are such piggies---they hoard everything! Plecos certainly aren't starving, by any means, but I'd be happier seeing them get more of the food. Guess I'll just have to keep loading up the tank with more sinking foods for them at night...
BV