Megalograptus

12.0 UPDATE
Megalograptus ('meg-ah-low-grap-tuss ', meaning “Big Writing” or “Great Graptolite”), commonly known as ‘the Sea Scorpion’, is an upcoming medium-sized aquatic prehistoric arthropod from the Late Ordovician Period, that will be added in Build 12.0, alongside the four other “mega” mobs. It, along with meganeura, will be the only arthropods in the mod (so far). It is purely carnivorous, and will be cathemernal, meaning it is active during the day and at night.

It will be one of, if not the fastest mob in the mod when in water.

SOUNDS
These sounds were taken off github.