Shibaura☆Animals

It like Fish.
Fish is　vertebrate other than the 　amphibians ,reptiles, birds, mammals .They live in water.
Fish does not have a four legs.
It breeds in the spawning.

The fish, breathe with gills, moved by the fin.

This is gills.

I can breathe underwater thanks to the gills.

Body of the fish is covered with scales.
Fish is heterotherm to vary the body temperature depending on the temperature of the external world.

That's right.
Half of the vertebrate is fish.
And the earliest vertebrate fish also.
It was five million ago.

Oh.
I'll introduce about body of fish.

The body has become streamlined in order to easily move the water body fish.
This form has become less susceptible to resistance of water.

Yes.
In addition, fish are divided into "head", "body parts" and "tail".
Tail is a 30% proportion of the in fish.
Proportion of the tail of eel is 70% of the total.

I will continue to introduce also　about details gills.

Gill is organ developed to obtain a slight oxygen in the water.

Blood vessels has been through there.

Animal spits out carbon dioxide takes in oxygen.It's the same with breathing.
It incorporate ion In addition also emission.It is the emission of ammonia

Fish　thanks to the gill can send a life in the water .So fish will die go out the water.

Next,I will introduce the fin.

Yeah.

Look at this picture.
This is an easy explain picture.

Yes.I'm fish.
It's some Fish of basic.
The shape of the fin is different by fish.
And.killifish distinguishes between male and female in the fin.

there in pairs and left and right pectoral fin, the pelvic fin, so it called Taihire.
There is one by one fin of the other.
But, some fish fin degenerate to adapt to life.

Actually, sunfish has led dorsal fin and anal fin .
It is called the rudder fin
Sunfish fish is the typical fin regressed.

Large fin of flying fish is what pectoral fins have evolved.
So they can fly.

Let's study to see also other fish.

Fish are floating by bladder.

Bladder　is Fish's Floatage circle.
It behind swells when you sink.
It extends or retracts like a balloon.
Fish are allowed to expand and contract with the gas it

No.
Bladder has evolved from the lungs.

But there is no bladders in the sharks and stingrays.

We have floated in and out to a material that is soluble in water to be out of the liver.

Yeah.

Yes.
They are completely different by salinity.
They are divided into two main.

There are a saltwater fish live in the sea, and freshwater fish to live in fresh water inland.。
In addition, saltwater fish are not doing celebrate and salt-water fish

The deep-sea fish,is fish that live in deeper than 200M.
Since deep-sea fish are the evolution of its own, it is interesting.

It is light on their own
But,some look strange.

Did you not understand the fish?

I will introduce some fish.