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14 Jun 2017 09:03 #1 by Bill
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I've found hundreds of these little beasties in my bath tub. They just sit on the bottom waving their tail from side to side non-stop but never seem to go anywhere.

I'd like to know if they are a threat to eggs, fry or fish before I accidentally introduce them to the tanks with other beasties for food.
I can't find any reference in Insect larvae lists/photos. Does anyone know what they are?

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14 Jun 2017 09:19 #2 by JohnH
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These are Chironomid pupae - it's the interim stage which a Bloodworm goes through before becoming a full-blown fly (what Trout anglers know as 'Buzzers'). The little 'hump' on the back is actually the wings case.

Totally harmless to your fish - indeed I believe the protein content is increased over the Bloodworm stage.

Mosquito larvae undergo a similar transformation - looking like little 'number-sixes'. scuttling down from the water surface when approached - quite funny (in their way) really.


N. Tipp

We're just two lost souls swimming in a fish bowl - year after year.

ITFS member.

It's a long way to Tipperary.

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14 Jun 2017 17:09 #3 by Bill
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Thanks, John. That's the first time I've seen those, I've seen the mozzers pupae, but not these. I've scoured every "pond life" website I could find and it didn't show these on any of them. Plus, stupid me should have known having been a fly-fisher for all those years :crazy:

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