Class Bivalvia

Lenger Island is one in few of the islands in Pohnpei that has a marine facility.


  1. Body is enclosed in a shell made up of two valves that are attached together.

  2. Has a wedge-shaped foot.

Class Bivalvia is the second most largest class in the phylum mollusca. this class includes clams, oysters, mussels, and scallops. Many of these are edible and some form pearls.

Shell Structure


  1. Valves: two convex halves of the shell

  2. Umbo: a swollen area near thefront part of the shell. It is said to be the oldest part of the shell.

How is pearl produced?

The shiny part is called nacre