* Location: Where is the pond located? (e.g., backyard, park, tropical region, temperate zone)
* Size: Is it a small pond or a large one?
* Water quality: Is the water clear, murky, stagnant, or flowing?
* Type of fish: What kind of fish live in the pond?
* Plants: Are there any plants in the pond?
Once I have this information, I can give you a more detailed and specific answer about the organisms that might live in the fish pond.