Skip to main content - The Official Portal for North Dakota State Government

Black Spot

Looks bad

Commonly infected wildlife


Is this animal infected?

  • Black spot disease appears as small, round, black cysts. Spots are commonly seen in skin of infected fish, but can also be embedded in flesh

Black Spot

Can I get it?


  • Black spot is not known to infect humans

How bad can it get?

No Risk

No risk to humans

Protect myself and others

  • Trim away infested tissue and cook thoroughly before eating

Symptoms in humans

  • None known

Safe for pets?

Yes - Remove infected tissue and cook thoroughly

Safe for pets

What causes it?

  • A larvae trematodes causes this disease. Trematodes are parasitic flatworms that have suckers and hooks to attach themselves to host tissues