Why Does My Fish Have a Bump?

Lymphocystis is a common iridovirus found in both freshwater and marine fish. Mostly causing a change in appearance by the presence of pink or white bumps anywhere on the fish's body. Unfortunately, there is no treatment, but the disease is self limited and does not cause any serious clinical signs.

Why does my fish have a lump?

Most tumors are seen as bumps or lumps under the fish's skin. But the location and signs of the tumor can be different for each fish, and depend greatly on the type of tumor. Unfortunately, internal tumors or cancers display symptoms once it has become to late to save the fish.

Why does my fish have a bump on its back?

Many clients call our office with concerns about “bumps on goldfish.” Most of these growths are benign cutaneous tumors within the layers of the fish's skin. (Technically nerve sheath tumors aka neurofibromas or shwannomas.)