Ocean Animals

Types of AnimalsThere are two main types of animals:

Vertebrates and InvertebratesVertebrates (have a backbone):

MammalsReptilesAmphibiansBirdsFish

Invertebrates (do not have a backbone):Arthropods

VertebratesAll vertebrates have a backbone All vertebrates have a skeleton on the inside

of their body to protect their organsAll vertebrates are covered in skin

SoftSlimyScaly

MammalsEvery mammal:

Has a backboneHas hair or furIs warm-bloodedBreathes oxygenHas live babiesDrinks milk while they are babies

ReptilesEvery reptile:

Has a backboneRough scaly skillLay soft eggs

FishEvery fish:

Has a backboneLives underwaterHas gills for breathingHas finsHas scalesLays eggs

BirdsEvery reptiles

Has a backboneHas feathersIs warm-bloodedLays eggsHas a beak

AmphibiansEvery amphibian:

Has a backboneLives in and out of waterBreathes oxygen Born in the waterLays eggs

The only type of animal that does not live in the ocean

InvertebratesDo not have a backboneOrgans are protected from the outside with a

shell or exoskeleton

Arthropods make up 90 percent of the Earth’s animals

ArthropodsEvery arthropod:

Does not have a backboneHas six or more legsJointed legsSegmented bodies

Aquatic InvertebratesSome invertebrates do not have a shell.

Instead, they have flexible skin. Examples of aquatic invertebrates:

OctopusSquidJellyfishSea anemones