1. Powerful Mandibles:
This leviathan is capable of locking prey in place with four powerful mandibles, and drawing it within reach of its jaws. Simulated pressure exceeds Seamoth crush resistance.

2. Echolocation:
The deep roar emitted by the reaper at regular intervals is effectively sonar - if you can hear it, the reaper can see you.

3. Profile:
Scanned specimen measured 55m long. Observed circling its prey and attacking from behind. This creature is almost all muscle. Very little brain. No sense of morality. Just muscle, synapses and teeth.

Motivational note: Congratulations on getting close enough to scan it and living to see the results!

Assessment: Extreme threat - Avoid in all circumstances