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Sea anemones (/ ə ˈ n ɛ m. ə. n i / ə-NEM-ə-nee) are a group of predatory marine invertebrates constituting the order Actiniaria. Because of their colourful appearance, they are named after the Anemone, a terrestrial flowering plant. Sea anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia.
Invertebrate sea life includes the following groups, some of which are phyla: The 49th plate from Ernst Haeckel's Kunstformen der Natur, 1904, showing various sea anemones classified as Actiniae, in the Cnidaria phylum "A variety of marine worms": plate from Das Meer by M.J. Schleiden (1804–1881) Acoela, among the most primitive bilateral ...
Marine life, sea life or ocean life is the collective ecological communities that encompass all aquatic animals, plants, algae, fungi, protists, single-celled microorganisms and associated viruses living in the saline water of marine habitats, either the sea water of marginal seas and oceans, or the brackish water of coastal wetlands, lagoons ...
The Ocean Photographer of the Year awards announced the winners of its 2024 contest featuring stunning images of underwater wildlife. 12 award-winning underwater photos give rare glimpses beneath ...
Marine botany is the study of flowering vascular plant species and marine algae that live in shallow seawater of the open ocean and the littoral zone, along shorelines of the intertidal zone, coastal wetlands, and low-salinity brackish water of estuaries. It is a branch of marine biology and botany.
Other notable invasive plant species include floating pennywort, [58] Curly leaved pondweed, [57] the fern ally Water fern [57] and Parrot's feather. [59] Many of these invasive plants have been sold as oxygenating plants for aquaria or decorative plants for garden ponds and have then been disposed of into the environment. [57]
Indian Sea Star: Fromia indica: Yes: Moderate: 7.5 cm (3.0 in) Mottled linckia: Linckia multifora: 13 cm (5.1 in) Little red star: Fromia elegans: Purple linckia: Linckia teres, or Tamaria stria: Yes: Difficult: 20 cm (7.9 in) Red Sea Star: Fromia millepora: Yes: Moderate: 15 cm (5.9 in) Red-knobbed starfish: Protoreaster linckii: No: 30 cm (11 ...
Sea lettuce: Ulva sp. Easy [119] Fast [119] Excellent [119] Moderate-High [119] Moderate [119] Yes [119] Sea lettuce is common in both tropical and temperate waters. The algae forms flat sheets which either anchor themselves with holdfasts or float by trapping pearled air bubbles.