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Cute and Cuddly Dads: Sea Horse Dads

Related Article: Learn more about seahorses.

Sea Horse dads are an anomaly in the animal kingdom, because they are the ones who are impregnated and go through labor. Not only that, but they can actually give birth to up to 1500 babies at a time!

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Characteristics of Crustaceans (1:13)

Crustaceans are arthropods that live in water and have jointed exoskeletons.

World of the Estuary: Bottom-dwellers (2:05)

Bottom-dwellers predominate in estuaries. Most are filter-feeders that strain water to obtain food. They also use different strategies to deal with the fluctuating estuarine environments.

World of the Estuary: Clams (1:19)

Clams are common, bivalve (two-shelled) bottom-dwellers with tubular siphons that retrieve food and oxygen for respiration. They also create jet propulsion for burrowing, helped by a fleshy foot.

World of the Estuary: Commensals (0:47)

Animals that share habitats with others are commensals. Examples include: clams, cusk eels, ghost shrimp, and clamworms.

World of the Estuary: Oysters (0:41)

Oysters are bivalve mollusks with shells shaped according to how crowded they were as they grew.

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The World of Animals: Phylum Echinodermata (1:07)

Echinoderms, represented by starfish and sea urchins, live in salt water. They possess an internal framework called an endoskeleton and use tube feet for locomotion and to pry open mollusk shells.

The World of Animals: Phylum Mollusca (1:16)

Mollusks are soft-bodied animals with three basic tissue layers and a coelom, along with well-developed organ systems. A snail is an example of a hermaphrodite.

The World of Animals: Phylum Cnidaria (1:32)

Jellyfish, corals and sea anemone have stinging cells that they use for defense and trapping prey. All stinging animals have radial body symmetry.

The World of Animals: Phylum Porifera (1:09)

Sponges are the simplest animals. They ingest food via a process called filter feeding.

Natural Focus: Freshwater Mussels and River Ecology (1:14)

Learn how freshwater mussels interact with river ecology in this segment.

Natural Focus: Freshwater Mussels Start Life (0:58)

This segment presents a detailed view of the mussel's birth.

Natural Focus: Welcome to Mussel Beach (0:51)

Take a look at this segment to catch a brief introduction to the life of the mussel.

Natural Focus: The Population of Asiatic Clams (1:44)

Chlorination helps prevent Asiatic clams from clogging water pipes. Cold water temperatures help keep the Asiatic clam population under control.

Natural Focus: The Invasion of the Asiatic Clam (1:20)

The Asiatic clam lives in fresh water and can produce thousands of offspring, due to its high fertility.

Natural Focus: The Effects of Introducing New Species (1:35)

Although the introduction of most non-native species to North America seems harmless, some species do cause problems. The Asiatic clam is a perfect example.