ARK: Survival Evolved Wiki

Alpha Mosasaur
Alpha Mosasaur
Alpha_Mosasaur.jpgAlpha Mosasaur
Alpha Mosasaur
Steam 242.0
Jun 2, 2016
Xbox One 737.0
Jun 15, 2016
PS 501.0
Dec 6, 2016
Logo Mobile 1.0
May 24, 2018
Nintendo Switch 599.0
Nov 30, 2018
Epic Games 311.74
Jun 11, 2020
Stadia 678.15
Sep 1, 2021
Spawn Command
cheat summon Mosa_Character_BP_Mega_C
cheat SpawnDino "Blueprint'/Game/PrimalEarth/Dinos/Mosasaurus/Mosa_Character_BP_Mega.Mosa_Character_BP_Mega'" 500 0 0 35
Variant Alpha Mosasaur (Caverns)
cheat summon Mosa_Character_BP_Mega_Cave_C
cheat SpawnDino "Blueprint'/Game/PrimalEarth/Dinos/Mosasaurus/Mosa_Character_BP_Mega_Cave.Mosa_Character_BP_Mega_Cave'" 500 0 0 35

Common             Rare
  Untameable   Cave

The Alpha Mosasaur is one of the Alpha Creatures in ARK: Survival Evolved, and one of the four Alphas living in the waters around the island.

Basic Info[]


Much like its little brother, the Mosasaur, the Alpha Mosasaur roams the depths of the ocean waiting for unwary survivors to come along. Its behavior is largely unchanged; it will swim randomly in a general area until it finds a player or tamed dinosaur in range and below a certain depth, whereupon it will pursue and attack the intruder. However, the Alpha Mosasaur is somewhat more persistent in its chase and may briefly pursue the player into much shallower waters than its smaller brother.


The Alpha Mosasaur is a much larger version of the already-imposing Mosasaur. The Alpha Mosasaur is approximately 50% larger than its normal counterpart, and comes exclusively in black, white, and red. Like other Alpha Creatures, it sports a distinctive fiery red fog that can be seen from some distance, even underwater and without a SCUBA mask.

Color Scheme and Regions[]

This section displays the Alpha Mosasaur's natural colors and regions. For demonstration, the regions below are colored red over an albino Alpha Mosasaur. The colored squares shown underneath each region's description are the colors that the Alpha Mosasaur will randomly spawn with to provide an overall range of its natural color scheme. Hover your cursor over a color to display its name and ID.

This information can be used to alter the Alpha Mosasaur's regions by entering cheat SetTargetDinoColor <ColorRegion> <ColorID> in the cheat console. For instance, cheat SetTargetDinoColor 0 6 would color the Alpha Mosasaur's "body" magenta.

Alpha Mosa PaintRegion0
Region 0:
X mark

Region 1 is not used
for this Creature.

Alpha Mosa PaintRegion2
Region 2:
Spinal Ridge
X mark

Region 3 is not used
for this Creature.

Alpha Mosa PaintRegion4
Region 4:
Alpha Mosa PaintRegion5
Region 5:


Guaranteed Special Loot

Base Stats and Growth[]

Attribute Base Value Level Increase
Health Health 54000 +6480
Stamina Stamina 400 +40
Oxygen Oxygen N/A N/A
Food Food 8000 +800
Weight Weight 1300 +26
Melee Damage Melee Damage 200 +10
Movement Speed Movement Speed 100% N/A
Torpidity Torpidity 3000 +180
Base Speed Sprinting Speed
Wild Wild
Walking 2200

Swimming 2700

  • 1These are the base speeds of the creature at 100% Movement Speed.
  • 2These are the speeds of the creature tamed and non-imprinted.
  • For a comparison of the speeds of all creatures, see Base Creature Speeds.
Attack Values
Melee Stamina Cost Attack Range Description
Base Minimum Activation The Alpha Mosasaurus bites the target.
0 1700 0 2000
Attack Type Damage Projectile Values Torpor Values Status Effect: Stamina Status Effect: Torpidity
Life Impulse Radius Base Mult Duration Damage Mult Amount Duration Damage Mult Amount
Melee 200



A low-level (1-20) Alpha Mosasaur is generally no match for a powerful tamed Mosasaur with a good saddle. Barring any surprises a player with such a mount can make short work of the Alpha. If Plesiosaurs are to be used, attack with a group, keep an eye on their health and be ready to pull up to heal. A herd of sharks will also work well due to their exceedingly powerful pack bonus and bleed.

A mid- to high-level Alpha (21+), on the other hand, may require considerable softening before even tamed Mosasaurs can bring it down and should not be attempted without either a very large school of high-level megalodons or a friend, as their health and damage rises quickly with levels, the highest-level Alphas will require considerably stronger fighters.


Low-level Alpha Mosasaurs require little strategy if you have a sufficiently powerful squadron or one very powerful tamed Mosasaur. Beware, though- like all Mosasaurs, Alphas have a very broad bite area and will likely be doing damage to several of your tames at once if you decide on a dogpile strategy. If you do not have powerful sea mounts, it's possible to whittle one down by luring it to a sea cave and taking refuge where it can't reach you, though this is dangerous as the Alpha will have to be repeatedly lured back to the cave when it loses interest.

High-level Alphas require extensive planning and preparation, with the largest ones reaching staggering amounts of HP and damage. If opting for a dinosaur-based assault, several players will be required to coordinate roles such as tanks, damage, and supplying the tanks with enough meat to heal. Well-prepared players can quickly heal their fleet and bite the task off in chunks, Alpha Mosasaur will not heal quickly enough to survive a repeated hit-and-run strategy. Be aware of your surroundings as well- nothing spells doom more quickly than being sandwiched between an Alpha and a rock face.

A high level basilosaurus can repeatedly attack the mosasaur while surfacing for healing, though this is best done with two tribe members and mate boosted pairs with good saddles.

It is not practical to take on high-level Alpha Mosasaurs with ranged weaponry due to their large health pools necessitating a massive expenditure of resources to kill them.


Probably the most obvious pick, using the inferior against the superior still works as long as your mosa is well leveled and has a decent saddle, however the need for a better saddle becomes less and less important the higher level your mosa is, still good to have though. If your mosasaur has great HP then it is best to just not move and instead just repeatedly attack on the spot since the mosasaur has a hard time chasing and hitting enemies due to it's lacking turn speed and big body. A high level tamed mosasaur is extremely strong and if a rider is on it, attacks quickly, dishing out absurd DPS. (tested on Mobile)


There is a way to take down an alpha mosasaur with a single megalodon (preferably a high level). First, go head-to-head with the mosasaur. Then, as it takes a few bites out of you, very slowly swim to the back of its neck, facing straight downwards. Then, rotate so that your shark's tail is facing away from the mosasaur's mouth. This way you can hit the mosasaur while it repeatedly tries to attack you. It will just stay still and try to bite you, but will keep missing. Keep attacking and rest if necessary. (Tested with a level 16 alpha mosasaur.)


A manta is also useful for killing very low level alpha mosas due to its downward attack. Just swim above it and keep attacking, while rising towards the surface. Eventually, the alpha mosa can't rise any further, and you can attack it as it tries to descend without any fear of it fighting back. Rinse and repeat.


Sarcos can take on an alpha mosasaur if they are high-level, but it is preferable to have a decent saddle as well. When you fight, try to stay on top of the alpha—this will lead you as well as the alpha upwards, where it will eventually disengage and attempt to swim away. When it does this, you're free to attack it, without taking damage in return, for about a minute. Take care not to run into any other aquatic threats while following it, however.


Another strategy is to use a Tusoteuthis. Swim near the alpha and turn away from it. When it chases you, swim directly up, tentacles down. When it reaches its max aggro height, start attacking it. The Tusoteuthis attacks 3 times per click, and very fast. If you attack constantly, it seems to get stuck in your squid's tentacles. Keep attacking it until it breaks free, then repeat. You will take some damage, but with at least 20k health, you should be fine. The Tusoteuthis gets a lot of health per level, so it shouldn't be too hard. With 375% melee damage, it took about 5–10 minutes to kill a lvl 44 alpha. You can use the pearls from the alpha to tame a higher level squid, allowing you to kill higher level alphas.


Additionally, luring an Alpha Mosasaur into an underwater cave with auto turrets works well. Place a generator on top of the shelf inside of the cave, then lower junction boxes into the water close to the floor of the cave. This allows players to place turrets underwater that can still be powered, simply set the targeting of the turrets to high and attack to either "wild only" or "all." Be careful as turrets are regarded as wooden structures and will be broken easily if the Alpha Mosa gets too close, to fix this make sure to put the turrets as far back into the cave as possible. This strategy was tested on a level 45 Alpha Mosasaur with 6 Auto turrets, it takes about ten minutes to kill the Alpha and about 300-400 bullets. If the Alpha swims away, simply swim out of the cave below the Alpha to regain agro.[1]


Do not attack the Alpha Mosasaur with melee weaponry. It will not end well.

If opting for ranged weapons, the most powerful crossbows you have will still take years to kill it.

Dinosaurs are the only truly practical weapon against the Alpha Mosasaur. Any tames that take it on should have very high health or be expendable.


Being found deep underwater, encountering the Alpha Mosasaur carries the same dangers as any underwater sojourn:

  • The highest Level Alpha Mosasaurus have health reaching over 200000 which for scale is more health than a Gamma Megapithecus Megapithecus making it have one of the highest health of any non-boss creature within the game.
  • Local residents of the deep sea, such as the Plesiosaur, Mosasaur and Angler.
  • While less common in the deep water, you can still expect to find plenty of Megalodons and brush into the occasional Manta rays.
  • If using a cave for refuge, Eurypterids may sometimes spawn.
  • Being underwater, especially in the Snow Biome, can quickly freeze the unprepared survivor.
  • Suffocation is an ever-present danger, especially if the Alpha gets a bite in on a survivor. One bite is often enough to destroy most SCUBA gear. If you (somehow) survive the encounter, you might not for long.
  • As the Alpha Mosasaur is an excellent source of Black Pearls, there may be competition from other tribes to harvest its bounty.
  • The Alpha Mosasaur will (briefly) pursue its prey into much shallower waters than any other deep-water predator. Be certain to keep moving for a short while after you surface lest the Alpha take one of your tames back down with it.
  • The Alpha Mosasaur also works a area guard because until it is defeated, the area it is located it is not safe to travel through or do anything in, they are extremely territorial and won't attack anything other than the survivor and their tames. So until the Mosasaur has been dealt with, don't even try to come near it's general area.


Like all Mosasaurs, the Alpha has a wide turning radius. However, due to their large HP and damage it is not advisable to try and exploit this to kite them as any latency at all may end in death. This is, however, useful in making an escape if you find your mount chewed out from under you. Alpha Mosasaurs cannot fit in caves, making these (theoretically) safe retreats. Its large body size can also be exploited, allowing very large crowds of tamed dinosaurs to get within melee range to kill it quickly.


  • it is the 11th largest creature in the game tying with the Dragon Dragon for 11th place.
  • This is the first aquatic Alpha to be released in Ark. Like the other Alphas it is very fast and should generally be avoided, unless if one has enough tames and equipment to take it down.
  • When players are underwater without a SCUBA mask being worn, the fiery red fog emitted from the Alpha Mosasaur has a green tint to it.
  • A very rare case is one can use Tusoteuthis to transport a Mosasaur to shallow water bay, and it will be trapped and will not fight back because its primary behaviour in shallow water is to find a way to go back to the deep ocean.
  • On Mobile, it is the only aquatic Alpha creature.
  • Spawning one on land will cause it to instantly disappear with a single blood spatter effect.