Juergen Freund / Nudibranch (Chromodoris annae) with Mushroom coral in the background. Lembeh Strait, North Sulawesi, Indonesia.

Alex Mustard / A Pygmy Seahorse (Hippocampus bargibanti) swimming in open water above its home seafan. Pygmy seahorses are small, most less than 15mm in total length. Lembeh Strait, Sulawesi, Indonesia, Celebes Sea,...