Heptapods

[Kzin]

Does anyone have anything to add on Heptapod evolution? In Story of Your Life, Heptapods were a 7-legged speices of alien that possesses the ability to see all events simultaneously. I speculate that they were probably not a predatory species, being that they were never portrayed eating meat and it would be difficult to chase after prey with their anatomy. Then again, the gravity on their planet may be entirely different.