10 Interesting Facts About Mollusks
Facts about Mollusks are invertebrates that include animals such as squid, octopuses, cuttlefish, nudibranchs, snails, slugs, limpets, sea hares, mussels, clams, oysters, scallops, as well as many lesser known creatures. There are an estimated 100,000 species of molluscs making them second largest phylum in the animal kingdom, having fewer species than only the Phylum Arthropoda. Here is the list of 1o interesting Facts about Mollusks
1. Facts about Mollusks there are eight groups of mollusks alive today. Aplacophorans (Class Aplacophora) are marine molluscs that burrow into the sea floor in deep waters. Bivalves (Class Bivalvia) are marine and freshwater molluscs that have a shell that consists of two valves that are hinged at the back. Caudofoveata (Class Caudofoveata) are small deep sea molluscs that burrow into soft bottom sediments. Cephalopods (Class Cephalopoda) include octopus, squid, cuttlefish and nautilus. Gastropods (Class Gastropoda) include snails and slugs. Class Monoplacophora, Class Polyplacophora, Class Scaphopoda.
2. The body of most mollusks consists of two parts: a head-foot and a visceral mass. In general, the head-foot of a mollusc is an elongated, soft structure that encompasses an anterior head and an elongated foot.
3. Facts about Mollusks have a mantle that secretes a hard shell that covers and protects the visceral mass. A layer of tissue called the mantle covers the visceral mass of a mollusk. The mantle secretes a shell that encases the mantle and the soft visceral mass below it.
4. Mollusks exhibit bilateral symmetry.
5. Most mollusks have an open circulatory system.
6. Mollusks are more closely related to annelids than they are to arthropods.
7. Facts about Mollusks there are approximately 100,000 species of mollusks. Of all the molluscan subgroups, the most divers group is the gastropods.
8. Some mollusks don’t have a shell.
9. Some mollusks don’t have a head.
10. Facts about Mollusks that the giant squid and the giant clam are among the world’s largest mollusks.