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Marine Chordates and Vertebrates

Species profiles and facts about marine vertebrate animals, from the tiny fishes to the largest whales. Click on a folder or a link below to learn more about different animals in the Phylum Chordata, which includes fish, whales, dolphins, porpoises, seals, sea lions, tunicates or sea squirts, and salps.
  1. Cetaceans - Whales (74)
  2. Fish - Including Sharks (65)
  3. Pinnipeds - Seals/Sea Lions (20)
  4. Reptiles - Sea Turtles (11)
  5. Sirenians - Manatees, etc. (8)

Types of Marine Mammals
Marine are a fascinating group of animals, and come in a wide variety of sizes and shapes, from the sleek, streamlined, water-dependent dolphins to the furry seals that haul out on the rocky coast. Learn more about the types of marine mammals below.

Class Mammalia
Description of the Class Mammalia, including characteristics of mammals and examples of mammals.

Sea Otter Information
Here's a round-up of articles about sea otters - small, furry marine mammals that life in the Pacific Ocean.

Sea Otter (enhydra Lutris)
Profile of the sea otter, one of the world's smallest marine mammals. Learn about what sea otters look like, where they live, what they eat and how they reproduce.

10 Facts About Sea Otters
Learn 10 fascinating facts about sea otters, one of the smallest marine mammals.

What Do Sea Otters Eat?
Learn about what sea otters eat, how they find their food, and how much they need to eat each day.

Northern Gannet - Morus bassanus
The northern gannet is a large seabird that can form dense nesting colonies and has a spectacular plunge-diving feeding behavior.

Wandering Albatross - Diomedea exulans
Albatross are a large seabird that can spend several months airborne. Learn about their habitat, diet and conservation status.

What Is Smallest Marine Mammal?
What is the smallest marine mammal? This article answers the question - what is the smallest marine mammal, featuring the world's smallest marine mammals and their lengths and weights.

Chordata - Vertebrates and Other Animals
Information about the animals in the Phylum Chordata, which includes the vertebrates and animals that have a notochord at some stage in their development. Includes examples of animals that are in the Phylum Chordata.

What Is a Sea Squirt?
What is a sea squirt? Information about sea squirts, also called tunicates.

Sessile Tunicates - Class Ascidiacea
Facts about the sessile tunicates - organisms in the Class Ascidiacea, including where they live, what they eat, and how they reproduce.

Sessile Tunicates - Class Ascidiacea
Facts about the sessile tunicates - organisms in the Class Ascidiacea, including where they live, what they eat, and how they reproduce.

Polar Bear Facts
Learn 10 facts about polar bears, marine mammals that live in Arctic regions.

Polar Bear (Ursus maritimus)
Learn about the polar bear, a marine mammal that lives in Arctic regions.

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