Boneshark

The Boneshark is a large, highly aggressive fauna species. It is an actively fierce predator and mainly dwells in Biomes such as the Underwater Islands, Crag Field, or the Bulb Zone.

Appearance
The Boneshark is a large, fully armored creature with a large head featuring spikes extending backwards from many sides of its head, and a long, armored body.

Its head features a large mouth full of small, sharp teeth, which rather than normal teeth, are an extension of the exoskeleton, and two bioluminescent green eyes.

It lacks a dorsal fin but has two spiked pectoral fins and flukes at the end of its tail. It is of a dull purple color, with orange patterns on its head and back.

Behavior
The Boneshark is carnivorous, so one can be seen chasing other smaller fish, such as the Peeper. It is highly aggressive, often going so far as to attack members of its own species. Once the player is spotted, it will charge at them while screeching.

Bonesharks are extremely quick and are more than capable of catching up to the player. To avoid them, swim in a circular motion until the creature loses interest or get into a submersible. The Repulsion Cannon is also an effective tool to fend them off. The Boneshark's attack deals 30% to the player. It deals less damage to submersibles, but is still a threat.

Bonesharks are also attracted to lights, as the Cyclops is able to draw in the creature's attention. Because of this, the creature can also be distracted using Flares or by using a Creature Decoy. It should be noted that the Boneshark will attack the Cyclops if it is provoked enough, it will attack it for a very low amount of damage by running into the Cyclops.

Bonesharks can be seen fiercely guarding their eggs, and will attack the player should they get too close.

Gallery
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Trivia

 * The Sea Emperor Leviathan and the River Prowler previously used the AI of the Boneshark.
 * Bonesharks once dwelled in large numbers in the Grassy Plateaus.
 * Through a mistake, Bonesharks were incorrectly scaled and around half the size they were intended to be for the majority of the early access phase of Subnautica. This was fixed in the Prison Update of 2017, where they were given a 50% size increase, then another 10% size increase on top of that.
 * Bonesharks are the most aggressive creatures in the game.