Some swim!
Some fly!
The world is full of many different types of animals.
Some breathe air
..some breathe underwater.
Some have skeletons...
...and others don't.
To help us understand the differences between the animals in our world, scientists classify, or sort, animals
into different groups that share important characteristics.
into different groups that share important characteristics.
octipus
Invertebrates are animals that do not have backbones.
Most of the animals in the world are invertebrates.
Some examples of invertebrates are...
Most of the animals in the world are invertebrates.
Some examples of invertebrates are...
squid
insects
arachnidis
starfish
sea urchins
jellyfish
crabs
lobsters
clams
....and many more creatures.
Loading...
..... but if I asked
you to think of an animal you would probably choose a vertebrate!
you to think of an animal you would probably choose a vertebrate!
Loading...
Vertebrates make up less than 5% of all animal species on earth...Vertebrates are divided into different classes, or groups.
Several of these classes are specific types of fish, for example:
lampreys
jawless fish, like
lampreys and hagfish
...and
cartilaginous fish, like sharks
and rays.
lampreys and hagfish
...and
cartilaginous fish, like sharks
and rays.
hagfish
sharks
rays
For simplicity's sake, these other classes are usually lumped together with bony fish and just called 'FISH.'
Let's look at the characteristics that make an animal a fish!
Fish live in the water, and they can breathe underwater.
They use gills, not lungs, to get oxygen from the water
around them.
They use gills, not lungs, to get oxygen from the water
around them.
