 Bluegills ("Lepomis macrochirus") and rainbow trouts ("Oncorhynchus mykiss") are other introduced species that are significant as predators of younger Clanwilliam redfins.Banded Tilapia ("Tilapia sparrmanii") is yet another introduced fish that has an adverse effect on the stocks of "B. calidus", in its case due to competition for food.The other main threat is water pollution and other forms of unsustainable water use.