What adaptations do rotifers have to survive the cold?

Rotifers have developed several adaptations to survive cold environments, including the ability to enter a state of cryptobiOSis, where they lose almost all their water content and can endure extreme temperatures and desiccation. They produce protective proteins and trehalose, a sugar that stabilizes their cellular structures during freezing. Additionally, some rotifer species can produce resistant eggs that can remain dormant until conditions improve, ensuring their survival through harsh winters. These adaptations allow them to thrive in environments that experience significant temperature fluctuations.