Try to get away

You try to escape by flailing your legs and head around, but some scaly legs locks your in place by going around them and the arms that are holding you squeeze you tighter. Seems like whatever is fucking you doesn't want you to go anywhere. When you start to lose all your strength by the lack of air you notice he has lessened his grip on you and start caressing your chest. You lose your consciousness before he cums and after he does and lets you go. Your body floats up to the top and you die off eventually due to the lack of air and water in your lungs. Whatever fucked you seems to went away because it notice you were dead. I don't think it was trying to kill you, just lost in pleasure.

Bright side is that your dead body soon gets found by a hungry shark, which brings about more when he starts eating you and your blood starts spreading around. So you feed a shark or two maybe three. Good for you.