1.  Guide to the Exotic Species of San Francisco Bay contains many images I have taken:

http://www.exoticsguide.org/index.html

Specifically, these can be found in the species gallery:

http://www.exoticsguide.org/species_list.html

2.  Image of the Australian tubeworm (Ficopomatus enigmaticus) http://www.frammandearter.se/0/2english/pdf/Ficopomatus_enigmaticus.pdf

3.  Images of “Dead man’s Fingers”, Codium fragile ssp. tomentosoides

http://sxbrc.org.uk/news/codium-fragile-ssp-tomentosoides
 
http://www.issg.org/database/species/ecology.asp?fr=1&si=796&sts

http://microbewiki.kenyon.edu/index.php/Chlorophyta

4.  Image of the air bladder of Macrocystis pyrifera

http://www.pwsrcac.org/docs/d0016100.pdf

5.  Image of Halichondria bowerbanki growing on Clathria prolifera

 http://nas.er.usgs.gov/queries/FactSheet.asp?speciesID=1217

6.  Image of the European green/shore crab [Carcinus maenas (Linnaeus, 1758)]

http://www.issg.org/database/species/ecology.asp?si=114&fr=1&sts

7.  Photo credit for the colonial ascidian Didemnum sp. In - An integrated assessment of the potential for further invasion of the colonial ascidian, Didemnum sp. in large marine ecosystems of the United States

http://www.nurc.uconn.edu/About/Events/event0016/docs/Didemnum%20IA%20-%20Draft.pdf

8.  Tunicate colony of Didemnum sp. (close up) overgrowing mussel. Dock at
Presidio Yacht Club, Horseshoe Bay, Sausalito, CA. May 25, 2004. Photo
credit: Luis Solorzano. Map Location no. 47.

http://woodshole.er.usgs.gov/project-pages/stellwagen/didemnum/htm/page11d.htm

9.  Image of the Bryozoan (Watersipora subtorquata) in Managing Hull-Borne Invasive Species and Coastal Water Quality for California and Baja California Boats Keptin Saltwater

http://seagrant.ucdavis.edu/WhitePaper2006.pdf

10.  Image of Sea lettuce, Ulva sp.

http://microbewiki.kenyon.edu/index.php/Chlorophyta

11.  Guide to marine invaders in the gulf of Maine:  Sargassum muticum, Japanese seaweed, wireweed

http://www.mass.gov/czm/invasives/docs/potentialinvaders/s_muticum.pdf

12.  Images of Botrylloides violaceus and Botryllus schlosseri in Herring Spawn survey Manuak, Revised, February 2007. C. fort, K. daniel, and M. Thompson. fisheris and Ocean, Canada, Science.

http://www.pac.dfo-mpo.gc.ca/sci/herring/hertags/2007SurveyManual.pdf

13.  Image of the ship worm Teredo navalis

http://www.frammandearter.se/5arter/pdf/teredo_navalis.pdf

14.  Many images I have taken of the flora and fauna of California can be found at: www.californaibiota.com