Porifera- Microciona coccinea 

The organisms in Phylum Porifera have several defining characteristics.  The organisms have no definite symmetry, but they often have a skeleton of spicules.  Their body is multicellular, with a few tissues, and no organs.  The cells and tissues are surrounded by a water filled space, but there is no true body cavity.  All are sessile, which means they live attached to something as an adult. 

The organisms can reproduce sexually or asexually.  If they reproduce sexually, it can be either gonochoristic or hermaphroditic.  The organisms in this Phylum have no nervous system.  During the life stages of Porifera, there is a distinct larval stage which is planktonic.  They live in aquatic environments, mostly marine.  All the organisms are filter feeders.

Examples of organisms in the Phylum Porifera include: Microciona coccinea, Halichondria moorei, and Neofibularia nolitangere.

Porifera- Neofibularia nolitangere 

  1. Ramel, G. (2010). The phylum porifera. Retrieved from http://www.earthlife.net/inverts/porifera.html 

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