The blue whale is the biggest species in the ocean. It's also the largest animal on Earth.

The blue whale is the largest animal on Earth. It plays a vital role in the ocean ecosystem. These whales grow to massive ...

While many shark species inhabit the ocean’s upper waters, some prefer its colder depths, with a few species growing to ...

However, in the last 500 years, the pattern has shifted dramatically, and now, size has overtaken all other factors as the biggest predictor of likely extinction, and by a lot.