The video "What Are Mollusks?" introduces viewers to the fascinating world of mollusks, the second largest animal phylum known as Mollusca. This educational content explores various species, highlighting mollusks as invertebrates with soft bodies, often protected by a hard shell. Key groups like gastropods, bivalves, and cephalopods are discussed. Gastropods, including snails and slugs, are the most diverse, and bivalves, such as clams and oysters, utilize dual shells for protection. Cephalopods like squids and octopuses are noted for their intelligence and predatory nature. The video not only educates viewers about these intriguing creatures but also inspires a sense of curiosity and potential discovery in the study of marine biology. It's a valuable resource for understanding mollusks' role in various ecosystems, providing foundational biological insight that's ideal for educational environments.