The bluefin killifish is actually a variety of fish indigenous for the coastal waters of the southeastern U.s.. This fish is also referred to as the Atlantic bluefin killifish, Gulf bluefin killifish, as well as the bluefin mudfish. George Berninger Jr./Wikimedia Commons The masked angelfish is a stunning reef dweller https://aquarium5feetprice.blogspot.com/2025/01/what-you-must-know-before-keeping.html