Marine Animals Definition Biology at Animals

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Marine Animals Definition Biology. Nektonic animals are those that swim and migrate freely, e.g., adult fishes fish, limbless aquatic vertebrate animal with fins and internal gills. Given that in biology many phyla, families and genera have some species that live in the sea and others that live on land, marine biology classifies species based on the environment rather than on taxonomy.

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The term encompasses the salty waters of the earth, and is also known simply as a salt water ecosystem. The low intertidal zone, which borders on the shallow subtidal zone, is only exposed to air at the lowest of low tides and is primarily marine in character. Fishes and molluscs and many mammals.

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Community of living and nonliving things in the ocean. These can include a diverse array of plants, animals and microbes (tiny organisms) such as bacteria and archaea. Definition of marine life the phrase 'marine life' refers to organisms that live in salt water. Marine biologyis the study of animaland plantlife within saltwater ecosystems.