Longfin Batfish🐠🦇 Wings of the sea | All About Animals The Longfin Batfish (Platax pinnatus / Platax teira) is often called the underwater angel because of its long, flowing fins that look like silk ribbons. Found in the warm waters of the Indian and Pacific Oceans, these fish glide gracefully around coral reefs and coastal waters, sometimes growing over a foot long. Their fins can be up to three times the length of their body, giving them a wing-like appearance. Juveniles look quite different