I've recently asked for, and received, help ID-ing snakes, gazelles and birds - all areas where I have some knowledge. Fish? I'm almost wholly clueless. Looking through aquarium photos, I feel as a real person must feel looking at pictures of mammals. This may be a rarity, or it may be something that is in every aquarium in the land. I haven't got a clue. I'm sure someone out there will know, however. Thank you, in advance. (photo taken July 2017).
