
Cordylophora caspia
Dr Horia R. Galea, accessed through the World Register of Marine Species via CC BY-NC-SA 3.0 License
Species Profile

Batillaria attramentaria
Susannah Anderson via flickr and the CC BY-NC-ND 2.0 License. This image was not altered.
Species Profile
Chelura terebrans
Luisa Borges, Universidade do Minho, through boldsystems.org and the CC BY-NC-SA 3.0 license.
Species Profile
Celleporaria pilaefera
Linda McCann, Smithsonian Environmental Research Center. Images from McCann et al. (2007) show (A) a colony encrusting a hydroid stem, (B) a group of frontally budded zooids, (C) three recently budded zooids and (D) a close-up of the zooid orifice.
Species Profile

Tubastraea micranthus
Wikipedia Public Domain (original author Albert Kok via nl.wikipedia).
Species Profile
Ulva ohnoi
MASANORI HIRAOKA, Cabi Compendium https://doi.org/10.1079/cabicompendium.109162
Species ProfileHyotissa hyotis
Wikimedia commons, via the Creative Commons Universal Public Domain Dedication.
Species Profile
Mytella strigata
the World Register of Marine Species (WoRMS) from the Natural History Museum of Rotterdam via a Creative Commons (CC BY-NC-SA) License
Species Profile