Fish oil has frequently been lauded as a great thing to give your tegus, both as a rich source of vitamin D3 and for other health benefits (skin, gut motility). Most of us, including myself, have purchased and used this resource without fully thinking where it may be coming from. We may wish to change our habits, I'd say this article definitely gives support for the argument that we should really be ensuring our pets get good exposure to UVB instead of going for cheap alternatives.
http://qz.com/171454/americas-health...-rarest-shark/
http://qz.com/171454/americas-health...-rarest-shark/