IXTL

Planet of Origin: Unknown but presumably destroyed for a long time.
Ixtls are a very ancient sentient species, thought to be extinct, although some specimen could still be floating in the emptiness of space in a state of suspended animation. They are red colored, with four legs and four arms ending in eight fingers. Their cylindrical body is virtually immortal and they have in full control of its  molecular structure, enabling them to survive unprotected in space for eaons in suspended animation and allowing them to withstand very high energetic discharges. To reproduce, Ixtl need what they call a Guul, i.e.living hosts in which it deposits their eggs. The eggs need only a few hours to hatch and then feed their living host.
Source: A.E. Van Vogh, The voyage of the Space Beagle