|Average length||almost 1 meter|
These aggressive creatures measure almost a meter in length. They possess multiple large claws, are covered in thick, bony scales and have a tube like mouth. They feed upon warm-blooded creatures (including humans) and attack their targets by clawing onto a victim while trying to insert their mouths into a major blood vessel. Once attached, the crana's mouth contains a paralyzing toxin that immobilizes its prey while it feeds upon the target's blood. On human-sized prey or larger, the crana may deposit up to 50 eggs in the victim (crana are asexual and can lay eggs once every 25 days). If a victim of a crana attack is not killed, but was injected with eggs, they will be terribly ill until the eggs are removed. If the eggs are not removed by a doctor within about two to three weeks, then the eggs will hatch and kill the victim as the larvae burrow out of the body.
When the crana cannot find food, they enter into a dormant state and can remain in this state for a long period of time. Any heat sources that approach nearby (living or mechanical) will awaken the crana. Sometimes crana have been found clinging to heat sink exhaust ports on battlemechs.
By the 31st century, the crana have become immune to even the most deadly toxins. While the crana prefer warm jungle environments, they can survive almost anywhere.
- Mechwarrior Companion, p. 79, "Creatures"