Thursday, April 03, 2008

Shore Behind of Yok Poon Primary School (5)

May be, i won't be able to update this blog again for months ...
i will on the road again soon and this time, i do not know when i will come back home again.

Banded bead anemones in the rock crevices.
When out of water, they retract their tentacles and look like beads of jelly.
In the pool, they extend their tentacles and filter feed.

This is a community of sand bubble crabs.
This kind of small crabs eat the coating of detritus on the sand grains.
Processed sand is discarded in little balls.
The tongue structure of the crabs is actually on their legs.

This looks like an elbow crab to me, with its relatively longer pincers.
During the talk with Dr. Dan, he shared about how crabs mate. The male organ of crab will go into the female's body. They can mate for ten days and up to 12 hours continuously for a day. The male will inject around 2 little of sperm into the female!

Barnacle is crustacean, or in simple words, the relative of crabs.
To continue the sex story, barnacles have the longest pennis for animals, relatively to its body size.
They can switch from male to female or vice versa.

Venus clams are normally found under the rocks.
When i was young, picking clams at the shore is a kind of family activity and source of extra-dishes.

Limpet is a kind of snail with the shape like a hat.
They lift their shells and crawl around the rock to graze algae.

Top shells are abundant at the shore. They are a kind of snail which graze on algae.