Betta Fish Anchor Worms

Anchor worms or "Lernaea" as they're termed in the science world are a parasitic crustacean. They latch onto a betta and burrow deep down into their tissue. You may not even notice your betta has this infestation until months down the road. This is because they stay hidden until they are ready to come back out into the water and lay their eggs. At this point you'll see large lesions on the body of your fish. This leaves your betta susceptible to bacterial infections in the tissue and blood stream.

To learn how to treat and prevent this parasite from hurting your betta fish, read this article: Betta Anchor Worms