Seahorse Frequently Asked Questions / How long do sea horses live on average?

This is an interesting question. Their are currently 54 species recognized seahorse species, and their lifespan likely varies by species. For instance, dwarf seahorses (Hippocampus zosterae) are thought to only live around 18 months and 2 years. Larger seahorses have a longer life span. Most people think it’s around 5-7 years, although we’re starting to hear reports of some living longer than 10 years in captivity.

In the wild, the oldest confirmed age is five and a half years. This is difficult to track because there are no outward indication of age once they reach maturity. The one that was confirmed to be five and a half years old was tagged and tracked over several years, so researchers were able to confirm her age. You can read more about Grandma here.

Posted in: Seahorse Facts