Here are a couple videos I took of our Marine Betta (Calloplesiops altivelis). In the wild they use the white spot on their tail, that looks like an eye, as a defense tool. Often they position their tail towards a threat and if it gets bit, it only looses part of its tail. This Marine Betta has been a pretty neat addition to our reef tank. They don’t get “big” as far as marine fish go and they get along with their fellow tank mates pretty well. Ours sits in a hole and peeks out until it’s feeding time then he flares up for food.