Fish oil is blood thinning:
http://www.healthy-heart-guide.com/n...-thinners.html
http://www.wholehealthmd.com/refshel...25,992,00.html
'Omega-3 fatty acids are also natural blood thinners, reducing the "stickiness" of blood cells (called platelet aggregation), which can lead to such complications as blood clots and stroke.'
...and you can get it by spearfishing

.