Sydney has great night diving.

 

 

 
Sydney lights Sole
Night lights of the Sydney city. What is waiting below the water? An unidentified sole is looking invisible on the sand.
Pygmy pipe horse Decorator crab
Pygmy Pipe Horses are almostly impossible to find because of their cryptic camouflage and colouration. At night, you have a better chance. Large ones are 4 to 5 cm long. They breed in summer and attach eggs to the male's abdomen. Many decorator crabs are perfectly invisible at Shiprock. If I think that I see one, I give the sponge or coral a little squeeze. The camouflage is so good that sometimes you squeeze a sponge and sometimes there is a crab there. I do not think that there is a better Decorator crab anywhere in the world for camouflage.