#1 Colossal Squid
This massive squid lives in the icy waters of Antarctica and is the heaviest invertebrate on record, sometimes weighing up to half a ton (via the Guardian). Its body can grow larger than a minivan, but its appearance makes it so unsettling.
The colossal squid’s eyes are nearly a foot across, the largest of any living animal, giving it an advantage in the darkness of the deep sea.
When it hunts, it lashes out with tentacles lined with swiveling hooks, pulling prey toward a sharp beak. The Schmidt Ocean Institute notes that it has only been seen eight times, with the first confirmed video recorded in April 2025.
Would you rank this mysterious giant near the top of the fear scale?
