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Bookmark or Share- Introduction to Porifera - University of California Museum of PaleontologyThe approximately 5,000 living sponge species are classified in the phylum Porifera, which is composed of three distinct groups, the Hexactinellida (glass sponges), the Demospongia, and the Calcarea (calcareous sponges).
- What is a sponge? - NOAA's National Ocean ServiceSponges are very simple creatures with no tissues. All corals require saltwater to survive. While most sponges are found in the ocean, numerous species are also found in fresh water and estuaries. Regardless of these differences, sponges are important inhabitants of coral reef ecosystems.
- Sponge | Definition, Features, Reproduction, & Facts | BritannicaSponge, any of the primitive multicellular aquatic animals that constitute the phylum Porifera. They number approximately 5,000 described species and inhabit all seas, where they occur attached to surfaces from the intertidal zone to depths of 8,500 metres (29,000 feet) or more.
- Sponge - WikipediaSponges (also known as sea sponges), the members of the phylum Porifera (/ p ə ˈ r ɪ f ər ə /; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. [3] [4] [5] [6] [7] [ excessive citations ] They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them ...
- Sponge - Reproduction, Filtering, Habitat | BritannicaMost sponges reproduce sexually, although asexual reproduction may also occur. The fertilization of an egg by a spermatozoan is peculiar in sponges. Asexual reproduction occurs in sponges in various ways, such as gemmulation, formation of stolons, and fragmentation of individuals.
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