A normal-ish megalodon, but Seafarer-ized and with a touch of polka dots, glow sticks and clowns.

Prehistoric fish

A kind of grayish glaucous for the skin, with bioluminescent semi-neon blue spots along the back, fading near the sides. The fins have spots.

The physique of a whale shark, with the snout and tail like that of a great white, with seven extra fins thrown in for good measure on the tail and spine.

On average from 40 (immature youngling) to 65 (full-grown [the largest is 68]) feet long

From belly to fin tip, about 15 feet tall

Anywhere from 60 - 75 tons

• Jaw. Huge. Need I say more?


• Bioluminescent spots. Quite noticeable.

Skin
Cartilage

Not very aggressive, unless you stand between it and food, provoke it or harm another sea creature.

Step One: Exist near the hunted.
Step Two: Loom over them in a great shadow of Terrifyingness.
Step Three: Bite and bite and bite and maybe thrash but mostly bite.

Step One: Bite attackers.
Step Two: If Step One fails, swim away to where the water pressure will be too great for attackers to follow.
Step Three: Sigh with relief.

10 to 15 mph

teeth teeth TEETH

Somewhat easily startled

Low moans, akin to those of a whale, but lower and hoarser with a hint of growl and aggressive thrown in

Smell.
They can smell blood in the water from up to two miles away [though most can only smell from about one mile away]

Eyesight.

Oceans.
Saltwater or freshwater, preferably more than two-and-a-half miles deep. They've been found as deep as four miles below sea level, though most don't venture that deep.

• In the ocean, wandering around unsuspectingly

-

• Giant squid


• Blue whales


• Anything meaty smaller than it, really. They won't eat their own kind though.