Crayfish

A child was very happy to catch "crawfish" in the valley near of our new classroom.

There are so many arthropod and insects and reptile including amphibiam.

PLS, Contact me if you want to visit here~

Happy children in new classroom~

Children from Seoul visited to new classroon last Sunday.

They catched many crayfishes in the valley and learned about interesting facts of crayfish.

3 Tentacle river snail

It's left side of tentacle is separated with 2 at the top.

Macrophthalmus Japonicus

We can discriminate female and male by their celiped.

If 2 legs are same, it is female but the male is larger than one.

They have 2 antenna and eyestalk and rostrum between antenna and eye on the head.

They can walk forward and backward and sideways.

They communicate through their claw-waving to fight with other males or invites females to mate.

Laying egg river snail~

River snail lay 5~6 eggs in a time and then die leaving only shell and operculum.

The female river snail is sacrificed to her eggs in laying.

Apple snail take in air through siphon

Apple snail use siphon to take in air on surface water.

Apple snail vs river snail

River snails have 1 pair of tentacle and gill to breathe.

Apple snails have 2 pairs of tentacle and gill/lung combination respiratory system.

They are all gonochorism, not hermaphodite.