ask somone at the pet shop
worms crickets and depending on the pet pinkey mice
even smaller fish, but however if it is a pet fish then talk to your local pet store for what to feed your fish.
blood worms
Fish..
If you have fish in an aquarium and some of the fishes tails are ragged or being eaten by other fish it means that that fish is being bullied by the others. Try asking a pet shop staff member for advise, but probably separate that fish from the others.
Many Fish don't eat guppies, like the neon fish. That is the most common mix I know.
Most meats and things like earth worms from the garden or blood worms from the pet stores and can also buy pellets for them.
salamanders eat crickets or they eat meal-worms but meal-worms are your best option
In the wild turtles eat fish so they will probably eat your pet fish.
In France and other countries they eat frog legs. IDK if you can eat a whole frog.
Yes, pet crabs will very likely eat fish food.
My pet Linnet likes to eat worms.