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clock-iconPUBLISHEDSeptember 1, 2016

This Giant Black Slug Is Almost As Big As Your Arm

Tom Hale headshot

Tom Hale

Tom has a Master's degree in Journalism. His editorial work covers anything from archaeology and the environment to technology and culture.

Senior Journalist

Tom has a Master's degree in Journalism. His editorial work covers anything from archaeology and the environment to technology and culture.View full profile

Tom has a Master's degree in Journalism. His editorial work covers anything from archaeology and the environment to technology and culture.

View full profile
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Whole lotta slug. Brave Wilderness/YouTube


When you think of sea slugs, you might think of pretty colors and vibrant frills. But not this bad boy.

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On the Youtube show Brave Wilderness, Coyote Peterson headed down to some coastal tide pools near Los Angeles with tide pool expert Aron Sanchez to root around for the world’s largest slug, the California black sea hare (Aplysia vaccaria).

Initially only finding crab after crab, they eventually strumbled across one. Coyote estimates this individual was around 60 centimeters (2 feet) long and weighed a whopping 4.5 kilograms (10 pounds), although they can reportedly grow to weigh up to 13.5 kilograms (30 pounds).

These sea-dwelling mollusks can usually be found off the coast of California and Baja, Mexico. Fortunately, they're pretty harmless since they can’t bite, are herbivores, and aren’t toxic. As Aron explains in the video, these creatures also have an internal shell, made of protein, which holds all their organs as it slimes around.

Check it out below.




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