Q2 Module 3Two Classifications of Shellfish.pptx

shellfish

1. Two Classifications of Shellfish Maryann Katang-katang

2. Mollusks Mollusks are soft-bodied sea animals, but most of them are protected by shells. They are further divided into three groups: Bivalves These have two shells that are hinged together. Examples are clams and oysters. They are often found buried in sand or attached to rocks in the sea. 2. Univalves These have only one shell. A good example is the abalone, which is known for its beautiful, shiny inner shell. 3. Cephalopods Unlike the first two, cephalopods do not have an external shell, but some may have an internal one. They are sea animals like the octopus and squid. They are highly intelligent and use their tentacles for movement and catching food.

3. Crustaceans Crustaceans are sea animals that have hard, segmented shells and jointed legs. Their shells act as protection, but since they outgrow them, they shed their shells in a process called molting. Examples of crustaceans include : small, edible crustaceans that are commonly eaten worldwide. Crabs have broad shells and claws used for defense and feeding. Shrimps

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