It varies from habitat to habitat, but can weigh from 150 to 650 kg.

Fur seals are divided into two species: northern fur seals and southern fur seals.
There is one species of northern fur seal and eight species of southern fur seal.

The green anaconda lives in the Amazon River in South America. It is a huge snake that can grow up to 9 meters. Females are larger.

Penguins are flightless birds, or avifauna. They used to fly in the past, but it is thought that they evolved and stopped flying. Instead, they became good at swimming & diving.

Sanderia malayensis eat other jellyfish & small fish.