Sources
https://www.studyblue.com/notes/note/n/slide-6/deck/1050080
http://www.mbgnet.net/salt/coral/animals/sponges.htm
https://en.wikipedia.org/wiki/Killer_whale
http://www.almanac.com/content/plants-attract-hummingbirds
http://www.fromthegrapevine.com/nature/israels-10-beautiful-animals
http://www.mirror.co.uk/news/world-news/fisherman-tries-spear-swordfish-beaten-5789307
http://www.earthlife.net/inverts/porifera.html
http://species-identification.org/species.php?species_group=caribbean_diving_guide&id=442
http://www.earthlife.net/inverts/cnidaria.html
http://tophdimgs.com/464477-underwater.html
http://palaeos.com/glossary.html
http://sneideman7.blogspot.com/2012/02/lines-of-evidence-for-evolution.html
http://www.ryanphotographic.com/platyhelminthes.htm
http://news.uwlax.edu/blue-crab-discovered-a-long-way-from-home/
https://www.reddit.com/r/WTF/comments/3dszzn/large_bodied_earthworm_spotted_in_ecuador/?limit=500