horn drupe

Drupella cornus

Here is a creature that to blend in it has rock grow over it, a living breathing rock that gathers energy from the sun and minerals from the water around it.

It can smell when its victim is injured or diseased, and when it finds it, it scrapes off its skin first and then devours its flesh.

(It is a coral feeder, covered in coralline algae and with an extendable proboscis that it uses to tear off the stinging cells of the coral first and then consume the flesh after).