Are clams with dark meat safe to eat?

Q: I brought home a Pismo clam and opened it up and the tongue is dark colored. Different than all the other clams. Is this clam safe to eat? What causes the dark colored tongue?
A: it's crucial to prioritize caution when encountering any unusual characteristics in seafood. To determine if your clam is safe to eat, it's important to consider additional factors beyond the dark-colored tongue. Here's what you should do:
1. Gather more information:
Observe the entire clam: Check for any other unusual features like discoloration, foul odor, or slimy texture on the meat or shell.
Recall the source: If you purchased the clam, contact the supplier and share your observations. If you harvested it yourself, remember the location and water conditions.
Research online: Look for reputable sources mentioning dark-colored tongues in Pismo clams and possible causes.
2. Consider potential causes:
Diet: The color of a clam's tongue can vary depending on its diet, but a significantly darker color might indicate feeding on something unusual.
Stress: Environmental stress or handling during harvest can sometimes affect a clam's appearance.
Disease or parasites: In rare cases, dark coloration can be a sign of disease or parasites.
3. Seek expert advice:
Contact your local food safety authority: Explain your concerns and provide details about the clam's appearance and source. They can offer guidance based on their expertise and local regulations.
Consult a reliable seafood expert: This could be a fishmonger, marine biologist, or other professional with knowledge of local Pismo clams.
Important Reminders:
When in doubt, throw it out! Food safety is paramount, and it's better to err on the side of caution than risk illness.
Never consume wild-caught seafood without proper identification and confirmation of its safety.
I hope this information helps you make an informed decision regarding your Pismo clam. It's best to prioritize safety and seek expert advice if you have any concerns.

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I had 2 of those. I threw it out. It was tough like leather also.