Bass tapeworm (2024)

Cause of disease:

Bass tapeworm

What does it look like?

Coiled, long flat worms intertwined in the fish's digestive tract or abdomen. Sometimes found as a single worm, but often several are found coiled like a ball. This may occur with other parasitic worms as well, not only the bass tapeworms.

Bass tapeworm (1)Bass tapeworm (2)

Fish species affected:

Found in both largemouth and small mouth bass.

Life cycle:

The tapeworm matures in the bass. Segments of the worm and eggs are passed from the fish to the body of water. When they reach water, they swell, rupture, and release large numbers of eggs. Eggs are eaten by a variety of crustacean organisms or any fish. A larval stage is formed in the invertebrates or in a fish. Adult tapeworms develop if bass consumes either the invertebrate host or the fish with the intermediate stages.

Where is the disease is found?

Everywhere in Minnesota where largemouth or small-mouth bass are present.

Is it safe to eat?

Mature tapeworm makes the bass unappealing for food even though the eating quality of the fish is not affected and there is no human danger if the fillets are cooked thoroughly.

How can I prevent the spread?

Don't transport bass from one body of water to another without a DNR permit. Don't release live baitfish into water.

Disposal of unused portions:

Unused or uneaten portions of fish should be buried or disposed of with household waste. Fish entrails should never be discarded back into the lake.

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Bass tapeworm (3)

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Bass tapeworm (4) Bass tapeworm (5)

Bass tapeworm (2024)

FAQs

Can bass get tapeworms? ›

Threat to Fish

The copepods are eaten by small fish. Once in the fish, the larvae bore through the intestinal wall and encyst in visceral organs and the body cavity. Bass then consume infected fish and the adult tapeworms develop in the fish's intestine, completing the life cycle.

Do largemouth bass have parasites? ›

The tapeworm matures in the bass. Segments of the worm and eggs are passed from the fish to the body of water. When they reach water, they swell, rupture, and release large numbers of eggs. Eggs are eaten by a variety of crustacean organisms or any fish.

What kills tapeworms in fish? ›

Cooking fish to an internal temperature of 140°F will kill all fish nematodes and tapeworms. Normal cooking procedures generally exceed this temperature. How about smoking, pickling, and salting fish? Heating hot-smoked fish to an internal temperature of at least 140°F will kill all fish nematodes and tapeworms.

How do I know if my fish has tapeworms? ›

Is This Animal Infected? Tapeworm larvae (plerocercoids) often appear as white cysts or coiled worms in the flesh or internal organs. The larvae are typically 1/8 to 1/2 inch in length.

Can humans get tapeworms from fish? ›

The fish tapeworm (Diphyllobothrium latum) is the largest parasite that infects humans. Humans become infected when they eat raw or undercooked freshwater fish that contain fish tapeworm cysts.

What are the little white worms in bass? ›

Tapeworms. Tapeworms are common in the organs and body cavities of many fishes. Anglers rarely know if tapeworms are present in fish since they live in the digestive tract and are usually discarded when the fish is cleaned. Tapeworms are white and can reach lengths of up to 12 inches.

Are bass safe to eat? ›

The answer may surprise you. First, let's investigate our headline: Is It OK to Eat Bass? In terms of public health, of course it is.

What kills largemouth bass? ›

Largemouth bass virus (LMBv) is a disease that impacts several fish species but only appears to cause death in some largemouth bass.

What diseases can a largemouth bass get? ›

LMBV is the only virus known to infect largemouth bass.

What kills tapeworms instantly? ›

How do you get rid of a tapeworm? You can easily kill tapeworms with anthelmintic drugs, including praziquantel (Biltricide®), albendazole (Albenza®) and nitazoxanide (Alinia®). Healthcare providers usually recommend praziquantel because it also paralyzes the worm, forcing it to dislodge from your intestinal wall.

Can you eat a fish with parasites? ›

Worm parasites only cause health problems when inadequately prepared fish are eaten (proper freezing and normal cooking kill the worms). The worms are not passed from person to person. Swallowing a live parasitic worm may not cause any illness if it passes through the intestine and is excreted.

What fish has no parasites? ›

These include Atlantic salmon, rainbow trout, gilthead seabream, turbot, meagre, Atlantic halibut, carp, and European catfish.

What temperature kills parasites in fish? ›

These parasites are usually killed by cooking the fish to a temperature of at least 145°F for fifteen seconds. The Food Code and the Texas Food Establishment Rules require that fish that are to be consumed raw or undercooked be frozen at a temperature and time guaranteed to kill parasites.

How long do fish tapeworms live? ›

It is the longest tapeworm found in humans – it can reach 10 metres in length and live for up to 20 years. The life cycle of the fish tapeworm is complex. Eggs from infected animals and humans are passed from faeces into water, where they hatch. This first stage of larvae is ingested by crustaceans.

What causes fish tapeworm infestation? ›

Fish tapeworm, or Diphyllobothrium spp, is acquired by eating raw or undercooked freshwater or anadromous fish (ie, sea fish that spawn in freshwater rivers, such as salmon). Marinated and smoked fish can also transmit the worm.

What fish can give you tapeworms? ›

You can get Diphyllobothriid tapeworm infection by eating raw or undercooked fish from many parts of the world. One type of fish tapeworm infects freshwater fish such as trout, perch, or pike.

Can you catch bass with worms? ›

Arguably one of the most productive baits on the planet is the plastic worm. Whether you fish it on a Texas Rig, Carolina Rig, Drop Shot, Florida Rig, or Split Shot Rig, you can almost always catch bass on a plastic worm. The plastic worm is a very simple bait to learn and master.

What type of live worms do bass like? ›

Red worms are smaller and, thus, great for trout and panfish, while Nightcrawlers are bigger and better for larger species like bass and catfish.

Can bass digest plastic worms? ›

Bass have strong stomachs, but can't digest soft plastic baits.

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