Shiprock A great night dive.

 

Shiprock is an excellent night dive. There is a profusion of life here especially on the walls.All sorts of incredible creatures venture out under the cover of darkness. It often has brilliant luminescence caused by the single celled algae, Noctiluca scintillans. (Scintillating night lights.) Turn off you torch and wave your arms about. The fairy dust effect is magical.

In addition, the two species of sea pens give off a beautiful cold green bio-luminescent light that shimmers for a few seconds after being touched. Generally, Shiprock is cooler in Autumn and Winter than the ocean by two to three degrees. Add an extra layer of rubber protection!

  White's sea horse Hunting Shell
  White's Sea Horse is easily distinguished by its head crown. They are the smaller of the two common species of sea horse found in Sydney's waters. They are able to change colour to a degree. Sea Horses feed on the abundant shrimp swarms that proliferate at Shiprock. The Nassarius Sea Shell is an effective hunter. At night, you can see its well developed siphon inside which is a powerful sensory organ called the Osphradium. It is used for hunting for its prey. The enormous siphon draws in water to follow the scent trail of its prey. Inside the special hunting organ gives it the ability to detect its prey by following slime trails. This is a sure way to find food.
  Goatfish Hula fish
  The bright red colours of this Goatfish enable it to blend in at night. This is because red is quite hard to see at night. It has a very successful lifestyle feeding on worms and crustaceans which it locates with its sensitive barbels. During the day, Goatfish are light sand colour to blend in with sand. Sydney Hula Fish constantly dance in the currents. They feed on plankton that drift past in the open water. Observing the small school reveals some insights into their lifestyles. The have a small territory a few metres wide and about one metre high. Dominant breeding males and females herd the school and keep them safe from predators.