Yesterday I bought a bicolour blenny and introduced him to my tank, at first he seemed fine and stuck himself into hole in the LR
. I've just noticed when he briefly popped out of the hole that his tail fin and part of his dorsal fin have disappeared, I'm not sure of the specific term bit they appear to have gone "spiny"?
Other than a few corals, zoo and pollys, 3 turbos and 2 hermits he is the only swimmer. Nitrates are a little high but all other levels fine.
Could this be a sign of stress??