Apart from the benefits to the individual juvenile - to be harder to spot by predators - I wonder if there's some benefit to being able to see what's coming up

Apart from the benefits to the individual juvenile - to be harder to spot by predators - I wonder if there's some benefit to being able to see what's coming up behind (looking through) one of your siblings. Somewhat aside, I note TFA uses the word octopi, whereas I thought we'd agreed that octopuses was the correct plural?