Board Thread:General Discussion/@comment-27217546-20161215235008/@comment-24652012-20161224214020

You know despite the sea of Aquamarine being salt water sirens can thrive in a fresh water envirment. The reason is their kidneys are large and very adaptive. They are designed to be able to survive many kinds of poison. What is poison but a ingredient in the envirment that is to abundant or to potent? And biologically if something reaches a certain level of immune to a toxin and said toxin is a certain level of common and abundant then take the toxic matter away and a life form can have the effect of being poisoned simply because the poison is no longer present and their immunity is resisting nothing, and thus hurting its self. A siren's kidneys have what is known as a instant reverse adaption, meaning the part of their immune system connected with the kidneys can also adapt to a sudden lack of toxin. Sirens still though prefer to live in salt water, not because its still better for their health, but because the presence of salt makes everything taste better. Their immunity to poisons however is likely weak compared to that of a krogan however, as sirens still are primarily designed for a healthy habitat. With radioactivity they usually adapt to it with treatment and protection as well as filtering radioactive partials out of the water and purifying them to recycle into fule rods.