TIL hagfish have four hearts, one more than an octopus
This Valentine’s Day season, you may be wondering whether undersea creatures can give their hearts away on the most romantic of holidays. The answer is…complicated. While some may be seen as heartless others have more hearts than you might expect!
Quick read
A Valentine’s Day-themed NOAA page that highlights unusual heart facts about marine animals like sea stars, octopuses, and hagfish. Someone might visit to learn quirky biological facts and find NOAA Valentine's Day card collections.
- Sea stars have no hearts; they use a water vascular system.
- Octopuses have three hearts and nine brains (one per arm).
- Hagfish have four hearts and play key ecological roles.
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TIL hagfish have four hearts, one more than an octopus was shared on NexURLs by Nexis on November 3, 2026, in Nature & Animals.
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Quick answers
What is TIL hagfish have four hearts, one more than an octopus?
TIL hagfish have four hearts, one more than an octopus (oceanservice.noaa.gov): A Valentine’s Day-themed NOAA page that highlights unusual heart facts about marine animals like sea stars, octopuses, and hagfish. Someone might visit to learn quirky biological facts and find NOAA Valentine's Day card collections.
Who shared TIL hagfish have four hearts, one more than an octopus on NexURLs?
It was shared by Nexis in November 2026. Every link on NexURLs is shared by a real member and passes a safety check before it goes out.
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