Re: NANFA-- fish parasites

Christopher Scharpf (
Sun, 10 Nov 2002 14:43:27 -0400

Yep, Pete nailed this one. The trematodes are unsightly, but harmless.

And Moon is right, glochidia grow on fins as well as gills.

Chris Scharpf

> From: "Pete Liptrot" <>
> Reply-To:
> Date: Sun, 10 Nov 2002 13:29:43 -0000
> To: <>
> Subject: Re: NANFA-- fish parasites

> They sound like encysted metacercaria of a digenetic trematode. They usually
> only cause minor irritation if any, and fish can live and breed quite
> successfully while infected. There is little chance of transmission to other
> fish, as what you are seeing is just an intermediate stage on the way to the
> adult fluke ending up in it's final host, usually a piscivorous bird. Just
> keep your pet Heron away from the tank and you should be OK.
> They are found pretty well all over the world, I've seen them on fish from
> here in the UK, South America, Asia and West Africa.
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