Misc: movies & music performer of title song from 1981 bond movie _for your eyes only_.?

Questions

The name for this semi precious stone comes from the latin for sea water?

The native inhabitants of Australia are called _____?

The original plan for Disneyland included a land called what?

The plant life in the oceans make up about what percent of all the greenery on the earth?

The praying mantis is the only insect that can do what?