Megalodon

During what is now being called the migration billions and billions of symbiotes left the cross dimension for some unknown reason and entered our own dimension via gates that opened randomly across the galaxy and targeted humanoids between the ages of 20-30 to bond with causing 1 in 100 to become a symbiotic creature.

The Megalodon is one of these, all of the symbiotes share the same rubbery shiny skin but vary in what abilities they give their hosts and what they actually look like. The Megalodon for example has dark gray skin with two other light tones of gray as detaling and causes the host‘s hands and feet to become webbed, the head also becomes covered with the symbiote but the person retains their head follicles their jaw becomes somewhat shark like with rows of razor sharp teeth [they can also regrow teeth like a normal shark as well, fins also grow on the back, forearms and lower legs.

The host has the following enhancements - Megalodons give a bite attack, quadruple a persons swim speed.