It depends on where they live. Fish of the smaller variety often eat plant and animal matter that lies on the ocean floor (i.e. a decaying piece of kelp or fish). Some small fish will eat tiny organisms that populate the watery environment around them; there are many types of crustaceons and other animals that may be almost too small to see with the naked eye, but make a perfect snack for a small fish. In freshwater areas, small fish will also prey on insects that land on the water's surface or the larvae of insects that spend their larval stage underwater (like mosquitos). In fact, there is a species of tiny fish related to guppies that people actually purchase to live in their backyard ponds or other standing pools of water. The fish prey on the water-bound mosquito larvae, thus drastically reducing or eliminating a mosquito population that once relied on the pool of water to reproduce. With the onset of West Nile virus in the United States, sales of this little fish have skyrocketed, as West Nile virus is often transmitted by mosquitoes.
Small wild insects and other arthropods, plus small fish for some species.
Small fish feed on many things. Some feed on aquarium plants. Others eat bacteria. Yet others can just eat fish food. Still, others may try to eat each other. YIKES!
algae if in the ocean or fish food if inside the aquarium. :)
Some birds some animals and some fish will eat wild fish.
they eat insects, fish food, leeches, snals , and small crabs
sea foods,algeal
yes they can but on small fishes
whale haunt and feed themselves. they feed at small fishes and eat them
Viperfish feed primarily on crustaceans and small fish.
Ocean Sunfish MAINLY feed on jellyfish...But also feed on other SMALL fishes.
Fishes and other aquatic animals can feed algae and other small aquatic creatures.
Crabs, shrimps, worms, clams, and small fishes
Cuttlefish (not cuddlefish) feed mainly on crustaceans, small fishes, and sometimes each other
Squirrelfish are known to primarily feed on small fishes and benthic invertebrates, like crustaceans.
Pilot whales predominantly feed on squid, although they are known to eat octopus and small fishes.
Medium fishes eat small fishes as that's just part of the food chain.
I usually use one small pinch of flakes twice a day.
Jawless fishes are voracious feeders while cartilaginous fishes are predators with a various diet.