Sea kraits are oviparous. They have a cylindrical body.They are distinctly banded with 20-65 black bands on a usually blue or blue-gray body. These bands extend from the neck area to the tip of the tail. Adult males can reach 75 cm (30 in). Females are significantly larger than males, reaching 128 cm (50 in) in length.

They can live in the land or in the ocean: They often hunt eels with their powerful venom and then digest their food and rest on land and use terrestrial rocks to shed their skin. They can hold their breath for long periods of time.

Killer Whales get their name from their reputation of being violent predators, exhibiting almost hateful behaviors when toying with their prey.

Individual Killer Whales are known to reach ages of 100 years old.

In the United States and some other places, this species is given complete legal protection as a result of it being a highly intelligent, marine mammal.

Hawksbill Turtles spend almost all of their time in the ocean, and females come to shore only to lay eggs.  

Unfortunately there are many threats to Hawksbill Turtle populations, and scientists consider this species to be critically endangered. Coastal development has reduced the area where they can successfully nest. Dogs and other animals often destroy their nests, and people harvest their eggs for food.

Some dolphins eat fish and other dolphins eat squid.

This animal gets its name from its habit of leaping from the water and spinning rapidly before landing with a splash.

Harp Seals are mammals.  Pups are born on the ice surface and are nursed by their mothers for only 12 days. They eat several dozen species of bony fishes and invertebrates.

Adult Harp Seals are eaten by Killer Whales  and large sharks.  Juveniles are eaten by Polar Bears and other terrestrial predators, including foxes and wolves.