Unique underwater footage of a pair of colourful and decorative Nudibranchs mating on a soft coral reef

scuba scuba diving diver snorkeling underwater underwater video underwater cameraman underwater footage great barrier reef tropical destination tropics animal protected species zoo marine biology marine conservation global warming coral coral bleaching travel destination marine park marine reserve animal encounter fish recreation pacific nature wildlife ecosystem nudibranch creature sea slug gastropod animal behaviour colourful blue planet aquarium collector fish keeper sea creatures ocean current sea sponges soft body cluster eggs reproduction system evolution decorative unique footage 4k resolution