Akrid

Highly variable between different Akrid sub-species.

Despite their wildly different phenotypes, all Akrid share a few biological traits:   1) Biolumonessance - All Akrid have some form of Biolumonessance. Different sub-species use it in different ways.   2) Massive internal body temperatures and perfect heat containment - Akrid are completely invisible to heat sensors and infrared technology. They do however have internal body temperatures measuring in the hundreds of degrees Celsius. The larger the Akrid the higher their internal temperature. Due to the massive amount of energy an animal would need to support these temperatures it is theorized that Akrid can absorb or "eat" ambient thermal energy to supliment their diet. For the largest of Akrid this may be the reason for their extended periods of comatose hibernation, absorbing geothermal energy for sustenance occasionally waking to eat living prey for needed minerals. Despite being invisible to heat sensors, all Akrid have heat sensory organs. When they die Akrid release their stored thermal energy as thermal radiation. This has been observed to act as a form of beacon to other Akrid, drawing them to the corpse.   3) Accelerated Regeneration - Akrid are capable of extremely fast self-healing. Likely linked to the insane metabolism that produces their massive body temperatures. In some sub-species this can manifest as near-instantaneous regeneration of missing body parts, while in others manifests as a way to reload evolved biological weaponry or cheat death from otherwise lethal trauma by healing all wounds while in a comatose state.

Unknown, likely highly variable between different Akrid sub-species.

Highly Variable between different Akrid sub-species.

All Akrid seem to thrive in cold temperatures. Experiments have also shown high tolerance to heat, likely due to the thermal activity under Sheol's surface.

With a few exceptions, Akrid are almost universally carnivorous. The smaller sub-species favour swarm and pack tactics, while larger ones typically act as ambush predators.

Data is minimal. Larger Akrid are theorized to hibernate for long periods of time due to the relative scarcity of resources.

Varies greatly between different Akrid sub-species.

Due to the sheer aggressive nature of Akrid it is impossible to domesticate them. Due to their perfect adaptation to Sheol's environment, hyper-aggressive nature, extreme survivability and ambiguous genetic heritage, Akrid are theorized to be some sort of failed, or more terrifyingly, successful form of biological weapon.

Varies greatly between different Akrid sub-species.

Planet-wide, different sub-species are more prevalent in different areas.

Varies greatly between different Akrid sub-species. Some sub-species are little more intelligent than swarming insects like locusts, while others show uncannily clever thought processes, learning from past encounters and forming behavioural strategies and tactics to circumvent previous obstacles.

Highly variable between different Akrid sub-species.

All Akrid sub-species appear to be symbiotic and parasitic to each other.