All I was saying was that swimming is a learned skill for us, humans... Unlike fish, some mammals and reptiles who have a morphology adquated to those environments... A xenomorph would not swim because of Ripley's DNA, it would have to have a built-in morphology thta would enable it t swim like it did on Alien Resurrection... Also, all I was saying too was that Ash said that the xenomorphs adapted to any hostile environment because they had the 'strangest habit' of replacing dead cells with polarised silicon', not because they automatically knew how to swim and fly... These 'skills' are not cellular related, UNLESS they have a reptilian or fish morphology, hence the gills, membranes, etc... We swim because we learn how to... we learn to cordinate arms and legs to swim... It is not an inate skill... That is why Aliens could never swim because of the DNA mix... And you are also assuming that they don't... We just don't know... But we know the swimming ability for humans is not inate, deep in our DNA... It is a learned skill... So AR made a huge mistake, though the underwater sequences were kinda cool...