list of dangerous leviathans and other carnivors in subnautica:
The gargantuan, a 5km long carnivore that can swallow anything whole, it can even be found eating a small ship during a modded cutscene. This leviathan cannot be found in the video
The Reaper Leviathan, 55m long killing machine. its apendages on its face can grab small vehicles with fins and many teeth, its horn on the front is terrifying to many. They can be found in the dunes, crash zone and mountains. Multiple reaper skeletons can be found in lava zone or near it.
The Ghost Leviathan, they are found in the Grand reef, Blood kelp zone, the void and the Lost River. They have 12 glowing eyes, can vary from 65m to 107m, their maximum is size is not available because they can grow infinitely hence how they move from the lost river to the Grand Reef and Blood kelp zone before the void. they are purple and worm like with a howling screech and no teeth.
The Sea Dragon Leviathan, a 112m long, fire breathing beast. its tentacles act as their legs to help propel themselves.Their back fin stabilises the leviathan, it has two webbed arms used as a means of close quarter combat. It has four glowing eyes at four more fins-two on the top and two on the bottom to help stabilise and a big gaping jaw. It can fire a burst of fireballs at a time, two can be found in the inactive lava zone with another in the active lava zone. A skeleton of these can be found outside the disease research facility in the lost river.
Sharks, there are two types of sharks in subnautica: The bone shark: the boneshark is 10m in length with thick armour potruding it's back, tail, fins and head. It has 4 spikes on it's head it also has yellow glowing eyes to see in the dark hence why it can be found in dark places, it has 6 nostril like holes in it's head and the gills are located on the head. The boneshark has teeth which are part of the armour making it more dangerous. It has 3 spikes as the tip of it's tail and 2 extra spikes in it's fins. They can be found in the Crag field, Underwater Islands, Primary containment facility aquarium, bulb zone, crash zone and the mushroom forest. The other type of shark is the sand shark, the sand shark is a similar but smaller size than the boneshark. It's found in the grassy plateaus, dunes and crash zone. They dive into the sand and aren't very dangerous but can cause damage to the player. it's eggs are in the grassy plateaus.