The tiny tentacle like arms you can see here belong to individual coral polyps. Corals are made up of colonies of these. Much of the time all that we see of coral is the skeleton, some hard which are made of limstone secreted by each polyp, and some soft which are generally sort of spongy. This is soft coral, when the polyps are out like this they are feeding, they capture tiny bits of plankton floating in the water. Usually they feed at night and when the day is dull. Even though they look plant like they are primitive colonial animals (some of the earliest to evolve!) and there are hundreds of different species of them mainly living in the worlds tropical oceans.
Turtles are not only sea creatures. There are many types of freshwater turtles, often seen swimming in water bodies in throughout Australia, but more commonly seen in the tropics with the warmer year round temperature. This one was warming itself in the sun along side a lagoon near Port Douglas in Qld. It is a Saw-Shelled turtle and this species has aparantly come to regard the introduced Cane Toads as a food source! Sometimes these turtles are seen wandering aparantly nowhere near water, maybe searching for a new water body ( if theirs has dried up) or sometimes they travel to new water bodies to find a mate.