[T-Bone Texan]

Could I put them in my outdoor pond?

My fish eat everything. They’d totally eat a crayfish.

After the hurricane I found a bird skeleton in my pond. They ate it to the bone.

[vetvetdoug]

Several of my best bass lures are based on the crawfish.

[BlueLancer]

My fish eat everything. They’d totally eat a crayfish. After the hurricane I found a bird skeleton in my pond. They ate it to the bone.

What do you have in your pond?

Or ..

[Louis Foxwell]

Birds are a natural food for fish. Research in the Amazon shows a substantial portion of fish protein diet is birds that die in the water. Ornamental fish hobbyists have taken to feeding ground turkey as a protein staple.
A climax crayfish tank or pond becomes stagnant because the crabs eat everything. Depending on the kinds of fish in your pond they certainly could eat the crayfish. Bass and catfish love crayfish. It would not be a sustainable food, however.