Velonceps Calyx, also simply known as Husks, are a species of parasitic creatures known for infecting Humans and turning them into a Zombie-like state. Despite being the smallest species discovered on their world, they are considered highly dangerous to Humans.
The exact Velonceps Calyx hasn't entirely been observed, and a Human host can easily be mistaken for a normal Human diver with its diving suit on. The main difference one can observe, though, is a small spike protruding from the victim's head. Whether or not this is the actual creature or just a side-effect of the infection is still up to debate.
Velonceps Calyx are parasitic in nature, and can't survive well out in the open. So to accommodate this, they take hold of a larger animal, namely a Human host, and use it as their vessel. As most, if not all, infected Humans are found in rusted out diving suits, it is assumed that they find the hosts through swimming in the open waters, and are able to slip inside the suit without being detected.
Host bodies take on a zombie-like behavior, with the parasite controlling their aggression and hostility towards similar lifeforms. This happens as a reproduction method, as normal creatures bitten by an infected one become infected themselves through the parasite's eggs latching onto the body.