http://www.merriam-webster.com/dictionary/gonad
http://www.madreporite.com/science/reproduction.htm

http://discovermagazine.com/1997/oct/squidsex1255
http://www.gov.mb.ca/conservation/sustain/srdone.pdf

http://www.angelfire.com/de2/atoy/rep.htm
https://www.newworldencyclopedia.org/entry/Grasshopper

http://www.crayfishworld.com/breeding.htm
http://seawifs.gsfc.nasa.gov/OCEAN_PLANET/HTML/squid_reproduction.html

Works Cited: