A phylum of small sessile aquatic animals living as small tufted colonies. Some appear like hydroids or corals, but their internal structure is more advanced. Most bryozoans are matlike, forming thin encrustations on rocks, shells, or kelp. (Storer & Stebbins, General Zoology, 6th ed, p443)
Invertebrates
Animals that have no spinal column.
Genome, Mitochondrial
The genetic complement of MITOCHONDRIA as represented in their DNA.