The zombie worm, or Osedax, feeds on whale bones on the ocean floor by secreting acid to dissolve them.

There are underwater waterfalls caused by differences in water density.

Fact #2442 · Ocean

The Portuguese man o' war's tentacles can extend up to 50 meters and remain dangerous even when detached.

Fact #5141 · Ocean

Certain fish can inflate their bodies to appear larger.

Fact #554 · Ocean

The Mariana Trench is so deep that Mount Everest could be submerged in it with over a mile to spare.

Fact #4253 · Ocean

The fangtooth fish has some of the largest teeth relative to body size in the ocean.

Fact #1392 · Ocean

The largest living structure on Earth is the Great Barrier Reef.

Fact #2632 · Ocean

The deepest part of the ocean is deeper than the height of Mount Everest.

Fact #2495 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #1832 · Ocean