Have you ever brought home a fresh catch, started filleting it, and suddenly found concerning, stringy things in the meat that look exactly like worms? You are definitely not alone. It is actually incredibly common to find these parasites in several popular saltwater species, including speckled sea trout, redfish, black drum, grouper, and more. Seeing them for the first time can immediately ruin your appetite and leave you wondering: Should you be worried? Is the fish still safe to eat?
Here is your answer to exactly what these are and what they mean for your dinner plans.
The worms you often find in the fillets of speckled sea trout and red drum are commonly known as “spaghetti worms.” Here is everything you need to know about what they are, how they get there, and what they mean for your catch.
What Are They?
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Scientific Name: They are the larval stage of a trypanorhynch tapeworm, specifically Poecilancistrium caryophyllum.
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Appearance: They look like opaque, white strings resembling thin spaghetti, usually found embedded in the upper back muscles (fillets) of the fish.
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Size: They can range from one to three inches long.
Are They Safe to Eat?
Yes. While they may look unappetizing, spaghetti worms are completely harmless to humans.
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They are a marine parasite that cannot survive in the human body.
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They do not alter the taste or texture of the fish.
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While cooking the fish kills them entirely, even if you accidentally ingested a live one, it would not infect you.
How Do They Get Into the Fish?
These worms have a complex, multi-stage life cycle that relies on the marine food web:
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The Final Host: Adult worms live in the spiral valves (intestines) of bull sharks. The sharks excrete the worm eggs into the water.
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The First Carriers: The eggs hatch and are eaten by microscopic crustaceans (copepods).
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Moving Up the Chain: Small crustaceans are eaten by shrimp and small baitfish.
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The Intermediate Host: Speckled trout and red drum eat the infected shrimp or baitfish. The worms migrate from the fish’s digestive tract into its muscle tissue, encysting there and waiting for a shark to eat the trout or drum, completing the cycle.
How to Handle Them
If you are cleaning a fish and notice them, you have a few easy options:
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Pick them out: You can easily grab the end of the worm with the tip of your fillet knife or tweezers and pull them out of the flesh.
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Trim the meat: If a particular section of the fillet is heavily infested, you can simply cut that chunk away.
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Cook as normal: If you miss a few, don’t worry. Once fried, baked, or blackened, they become entirely indistinguishable from the rest of the fish.
Older, larger speckled trout and red drum tend to have more of these worms simply because they have had more time to accumulate them through their diet.
Finding worms in your beautiful fillets can definitely be a shock at first, but hopefully, this puts your mind at ease. Don’t let a few spaghetti worms ruin your next fish fry or cause you to throw away perfectly good meat! Finding them is simply a reminder that your fish was living wild in a healthy marine ecosystem. Whether you choose to pick them out, trim around them, or just cook them right along with the fish, your meal is completely safe and will taste just as delicious.
So, fire up the stove, get your favorite breading or seasoning ready, and enjoy your hard-earned catch with confidence.
