Octopus are part of the cephalapod family. They are quite special in the way that they reproduce. Male octopus have what's called a hectocotylus which is one of his arms that is modified to be able to store and then release spermatophores (octopus swimmers) which go on to fertilise the female's eggs. Males generally form a new hectocotylus in each new season.
Green turtles are quite interesting in that their diet changes as they grow from juvenile to adult. Juveniles are omnivores and feed on invertebrates like crabs, jellyfish and sponges whereas adults are herbivores and feed on sea grasses and algae. This change in diet and move from offshore to inshore waters to find food can sometimes stress out the turtle and result in the early death of it. In the north west of Australia we often find green turtles of 4-5 years age washed up on the shores because of this reason.