White Nudibranch (Tritonia festiva) in amongst branches of a red gorgonian off Santa Cruz Island.
This Painted Greenling (Oxylebius pictus) appears dull in the water but its vivid colors bloom when well-lit. The Greenling is hunting above a nest of Brittlestars.
When I spotted this Tube Sponge formation off Cozumel, Mexico, I knew it would be my Halloween calendar image. The natural imitating the supernatural - pretty spooky!
Land Iguanas are well worth taking some trouble to see eye to eye. This large specimen allowed me to crawl within 2 meters to photograph it in the lush greenery of Cozumel Island.