Exactly he found a tiny hole and he sticks his head out and waves like and eel but I thought he was dead sk I went to get him out and he scared the crap out of me. Lol
Most blennys (blennies?) change color at night. Some get darker like my Flame tail. Some get lighter. Both my Midas and Tail spot get brown stripes on their faces. Blennies are one of my favorite species of SW fish.