Tiger Threshers are eel-like creatures that have leopard-like splotches towards the front of their body, and small stripes towards their tail (like a tiger). Their head is transparent and bioluminescent, like that of a barreleye fish. Like the head of the Tiger Thresher, their tail also glows, but not as brightly as their head. The spine of the Tiger Thresher has spiny protrusions that cover the majority of their back. Tiger Threshers do not have visible eyes, like most of the sea-life on Europa. They also possess a "beard" on their neck.
Tiger Threshers are only found in swarms (amount depends on the difficulty) with Bone Threshers.
In-game
Tiger Threshers do not do notable damage to a submarine, but they can severely damage the hull when in large numbers. They will favor going after humans out in the water, and their razor-sharp teeth inflict heavy bleeding on their prey. Tiger Threshers are capable of entering the submarine through holes in the hull.
Tiger Threshers are one of the many creatures that prey on lesser creatures such as Crawlers. Should a deceased Tiger Thresher be nearby, any living Tiger Threshers will cease their current action in order to cannibalize the corpse.
Tiger Thresher can't breath air, and dies fast in a room without water.