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Nereis worms are commonly known as rag worms or clam worms. The body is long, slender, and dorso-ventrally flattened, reaching a length of 5-30 cm. The head consists of two parts: a roughly triangular anterior lobe—the prostomium—and a posterior ring-like portion—the peristomium.Class Bivalvia (“two shells”) includes clams, oysters, mussels, scallops, and geoducks. They are found in marine and freshwater habitats. As the name suggests, bivalves are enclosed in a pair of shells (or valves) that are …Some live symbiotically with crabs, clams, oysters, shrimp, and barnacles. Some marine flatworms are brilliantly colored (Fig. 3.36 A) while others are drab and blend into the environment (Fig. 3.36 B). ... The worms in the phylum Annelida (from the Latin root word annelus meaning ring) typically have complex segmented bodies (Fig. 3.43). The ...Clams and their relatives (oysters, scallops, and mussels) are often called bivalves (or bivalved mollusks) because their shell is composed of two parts called valves. Bivalves have a long history. Their fossils first appear in rocks that date to the middle of the Cambrian Period, about 510 million years ago.See a clam diagram, study the clam digestive system read about the excretory system of these animals from the phylum Mollusca. Updated: 11/10/2021 Table of ContentsThe last phylum in the table, the Chordata, also includes many invertebrate species. Tunicates and lancelets are both invertebrates. Altogether, invertebrates make up at least 95 percent of all animal species. The …15820 Afr. J. Biotechnol. Table 1. Means of physical and chemical characteristics of smoked skipjack tuna produced in Kendari city. ParameterLearn more about the giant clam, the 500-pound mollusk that spends its life anchored to a reef. See how symbiotic relationships with algae allow them to thrive.Clam Taxonomy Subclass Heterodonta – clam-like with large hinge teeth Order Veneroidae Family Veneridae Venus or “heart” clam Side view is cardioid (heart-shaped) 53 genera and about 500 species Most are edible and support valuable fisheries and …Class Bivalvia consists of mollusks with two shells held together by a muscle; these include oysters, clams, and mussels. ... Phylum Mollusca is a very diverse (85,000 species ) group of mostly marine species, with a dramatic variety of form. This phylum can be segregated into seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia ...Giant clam. The giant clams are the members of the clam genus Tridacna that are the largest living bivalve mollusks. There are actually several species of "giant clams" in the genus Tridacna, which are often misidentified for Tridacna gigas, the most commonly intended species referred to as "the giant clam".Mass: 110 lbs (Adult, Male) Gestation: 63 days. Height: 2.6-2.8 ft. (Adult, at Shoulder) Litter size: 4-7 pups. Speed: Up to 40 mph. Reproductive System of a Male Wolf. Wolves are highly social creatures, and they live together in packs which consist of, on average, seven wolves. Wolves are about ready to mate at two years of age.The phylum echinoderms is divided into five extant classes: Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), Crinoidea (sea lilies or feather stars), and Holothuroidea (sea cucumbers). The most well-known echinoderms are members of class Asteroidea, or sea stars. They come in a large variety of ...Clam shrimp (formerly all grouped in order Conchostraca) are actually crustaceans and are not related to clams at all. Their carapace takes the form of two brownish, hinged, dish-shaped shells, which they clamp shut when disturbed, so they look a lot like clams. However, the animal inside has jointed, shrimplike legs (up to 32 pairs) and bristly, feathery antennae, which they extend outside ... Cool facts. As its name implies, the giant clam is the world’s largest living marine bivalve (clam, mussel or oyster). Their soft bodies account for only about 10 percent of their total weight. Once a giant clam settles into a place and begins to grow, it stays permanently attached to that spot for life. A giant clam can live 100 years or more!

Physiology Mya arenaria has a calcium carbonate shell that is thin and easily broken, hence the name "soft-shells" (as opposed to its beach-dwelling neighbors in some regions, the thick-shelled quahog ). This clam is found living approximately 3-8 in (7.6-20.3 cm) under the surface of the mud.Animals, such as mussels and clams (phylum Mollusca), have developed behavioral adaptations that expend a lot of energy to function in this rapidly changing environment. When these animals are exposed to low salinity, they stop feeding, close their shells, and switch from aerobic respiration (in which they use gills) to anaerobic respiration (a ...What is the phylum order class family genus and species of clam? "Clam" is too broad for order, family, genus and species. But otherwise; they are in the phylum Mollusca in the class Bivalvia ...Mar 22, 2023 · The phylum Mollusca includes clams, mussels, and squid, which is why clams are classified as Class Bivalvia. Oysters and clams can be found in the open ocean, whereas clams can be found in freshwater. Clam shells are also different from oysters. A flat, oval shell is found on oysters, whereas a conical shell is found on clams.

What are giant clams? Giant clams (Tridacnidae) are a family of bivalve molluscs that live in tropical waters on coral reefs. They are unique due to their large size and very specialised feeding mechanism. The largest giant clam species, Tridacna gigas, is the largest two-shelled (bivalve) animal that has ever existed. There is nothing in the …Phylum: Mollusca (Mollusks) Class: Polyplacophora (Chitons) Class: Gastropoda (snails) Class: Bivalvia (Clams) Class: Cephalopoda (Nautilus, Squid, Octopus) All mollusks have a visceral mass, a mantle, and a foot. The visceral mass contains the digestive, excretory, and reproductive organs. The mantle is a covering. It may secrete a shell.Nemertini. Nemertinea. Rhynchocoela. Nemertea is a phylum of animals also known as ribbon worms or proboscis worms, consisting of 1300 known species. [2] [3] Most ribbon worms are very slim, usually only a few millimeters wide, although a few have relatively short but wide bodies. Many have patterns of yellow, orange, red and green coloration.…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. The Atlantic jackknife clam, Ensis leei, [1]. Possible cause: Scallop (/ ˈ s k ɒ l ə p, ˈ s k æ l ə p /) is a common name that encompasses vari.