My Lawnmower Blenny has a huge gash in his side and I have zero ideas of what caused it. I only asterina, nassarius, scarlet hermits and a fighting conch in the tank.
Gash is on the center of his body. Almost looks filleted.
New and only fishy addition. Has been in tank for 2 weeks, and was fine at 11am today. I wonder if he got spoked and hashed himself on a rock. I just really hope he pulls through.