Interesting question as to whether or not such grubs can affect cats. Since they have no scales, the parasite situation could be quite different with them. I eagerly await info from the experts.

For example, I have the occasional fish lice (louse?) on my LMB or BG (a very small crustacean that hangs on under the edge of a scale; looks like a pimple and has no effect on edibility), but I have never seen them on any catfish.

Redear Sunfish (which you may be too far North for) or Pumpkinseeds (which should survive quite well anywhere in NY) both eat the snails which are one part of the grub parasites' life cycle. So if you can add them to your pond, the incidence of grubs on your fish should decrease.


"Live like you'll die tomorrow, but manage your grass like you'll live forever."
-S. M. Stirling
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