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Do Carp Eat Other Fish?

Do Carp Eat Other Fish?

No matter if they are in a garden pond or out in the wild, carp are omnivorous fish that eat copious amounts of food. And so many people are wondering if other fish are on the carp’s diet as well.

As all members of the wider carp family (Cyprinidae) are omnivores, they mostly feed on aquatic plants and smaller water insects. They do however eat the occasional small fish if they manage to catch one. Additionally, they can also accidentally ingest fish eggs while feeding on the bottom.

Keep reading this article and find out the complete answer to the interesting question: Do carp eat other fish?

Do Carp Feed on Smaller Fish?

Common carp do not actively hunt for and feed on smaller fish, as they aren’t predatory fish by nature. However, it occasionally happens that carp will eat smaller fish, if they happen to get too close to their mouths or if they lie dead on the bottom.

While carp most commonly have a herbivorous diet, they are nonetheless classed as omnivores, eating everything from aquatic plants and zooplankton to insects, worms, mussels, and crawfish.

And so, being the opportunistic feeders they are, they do not shy away from eating smaller live or dead fish.

However, given the fact that carp do not move about really fast, and so can’t actively chase and catch fish, plus the fact that they will mostly scavenge the bottom for food, it is extremely rare that carp actually feed on smaller fish.

If they happen to eat a fish, and that is something I, as an angler, have observed multiple times while fishing, it is almost always one of the following scenarios that are taking place:

  1. The carp are in a feeding frenzy among a school of smaller fish and simply happen to suck in one of them while feeding on the bottom.
  2. While scavenging the bottom for food, carp will sometimes suck in a small dead fish that is lying on the bottom of the lake or river.

Hence, a carp eating a small fish is more accidental than anything else. But given the fact that they are true omnivores, they won’t spit the fish out again, but instead, swallow it happily. Carp do need a lot of protein, after all.

Do Carp Eat Fish Eggs?

Carp can also feed on other fish species’ eggs, but never in an active way. They won’t seek out fish eggs and feast on the thousands and thousands of eggs that other female fish have laid on the bottom or onto underwater vegetation.

Instead, much like the smaller fish that occasionally happen to get sucked into their big mouths, the carp will simply suck in any fish eggs that happen to lay around where they feed.

Much like a vacuum cleaner, a carp will suck in everything in its path when it’s hungry, and so fish eggs that lie scattered all over the bottom or that are attached to underwater plants will get sucked in, especially due to the fact they are are so tiny and do not weigh much at all.

It did surprise me, however, that they do not feed on fish eggs actively, as they are such rich sources of protein and very easily ingested. They would make for a very easy food source!

What Fishing Baits Do Carp Prefer?

a carp angler holding a big common carp that he has caught on a boilie and pop-up
Courtesy of Jay White

If you’re a fisherman who wants to catch carp, you might be wondering what types of bait this fish species prefers. While they can virtually be caught on almost anything, the best baits carp include the following:

  • Boilies (small, boiled dough balls with various flavors)
  • Pop-ups (same size and shape as boilies, but buoyant, for better visibility underwater)
  • Sweetcorn and maize
  • Worms
  • Maggots (Euro larvae)
  • Pellets

And as carp can have an unbelievable appetite, baiting, or chumming your fishing spot can be a very good idea. More food will almost always attract more carp and once they have found your baited fishing spot, all the food will make them stay for a while, increasing the chance of the fish actually finding and picking up your hookbait.

You can use one, or a mixture of the following baits for pre-baiting/chumming your carp fishing spot:

  • Groundbait
  • Packbait
  • Boilies
  • Maize
  • Pellets
  • Beans
  • Hempseed

Do Koi Carp Eat Other Fish?

several koi carp in a pond feeding on the surface

Many people who own koi carp wonder if they eat smaller fish or if introducing smaller species into one’s koi pond is a safe thing to do, which is why I wanted to include a section on koi carp in this article as well.

Koi carp are colored varieties of the Asian Amur carp (Cyprinus rubrofuscus) and are for the most part kept in outdoor ponds and water gardens.

Much like their wild relatives, koi are for the most part herbivores, but unlike wild carp, their opportunistic omnivorous side is much more pronounced.

In fact, they seem to be able to develop a taste for both other species and fish fry (eggs) when coupled with smaller fish in an enclosed pond environment.

They are even known to eat their own eggs! Such an opportunistic appetite definitely implies some risks for other fish species, which is something to keep in mind when wanting to introduce smaller fish into your koi pond.

The following fish species can be eaten by koi carp and should hence not be introduced into your pond or water garden:

  • Guppies
  • Minnows
  • Smaller goldfish
  • Mollies
  • Danios

If you want to put other species into your koi pond, consider buying only adult male or only female fish of bigger species. Bigger sized fish cannot be devoured by the koi and as they are only male or female, they won’t produce fry and offspring that might fall victim to the hungry koi carp either.

Do Carp Have Teeth?

While you would think that carp do not need any teeth in order to eat plants and small insects, they actually do have a set of fairly strong teeth at the back of their throats. These teeth are called pharyngeal teeth and are primarily used to chew and grind hard food, such as mussels or crayfish shells.

You can find out more about carp teeth by reading this in-depth article I have written on that topic.

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