The Maelstrom: terror of the depths

I’ve noticed that the aquatic update, while definitely making the oceans more immersive really failed in the hostile mobs department with only 2 being added, so I propose another mob, The Maelstrom

This mob would take the form of a giant maw 2 blocks high and wide, with a dark blue colour on the upper jaw but a light blue shade on the lower jaw

The Maelstrom would spawn rarely near shipwrecks but be completely invisible. it would attack only if a mob entered a 32-block radius around it once they entered the radius it would surface, either generating an extremely strong bubble column that would drag them down at sprinting speeds towards its maw or if you were swimming along the ocean floor bite down, this attack would deal 20 hearts of damage 

The only way to damage The Maelstrom is to strike it In the mouth as its hide is simply too tough to be damaged by swords, it has 75hp.

When slain the Maelstrom has a 50 percent chance to drop a abyssal tooth. An item when combined with a trident in a smithing table could make An Abyssal sceptre a tool which while having lost 2 hearts of damage would be able to generate bubble columns and deal 5 more hearts underwater