The Woody Head rock platform and bay have many great marine animals easily seen by snorkellers. I’ve written many posts about this area; you can use the search function on this blog to track them down.
An example is the beautiful marine flatworm, Pseudoceros sp. [Update: Gary Cobb of http://www.nudibranch.com.au/ thinks it is an undescribed species of Pseudoceros.]
Museum Victoria says:
They are voracious predators which attack and digest prey with eversible (able to be turned inside out) mouthparts (called a pharynx). Oysters are a favourite food, but no doubt there are many prey preferences and other associations with invertebrates that are yet to be discovered. Many flatworms are strikingly coloured, are toxic to other invertebrates, or mimic other invertebrates (or all three). Sex in flatworms is bizarre. Flatworms are hermaphrodites (each worm has both male and female reproductive systems) and sex may involve “penis fencing” whereby each worm tries to spear sperm into the other. Sort of like a “pin the tail on the donkey” game, albeit with significant family planning consequences.
An excellent guide to flatworms is the book and CD set, Fabulous Flatworms: A Guide to Marine Polyclads by Leslie Newman & Lester Cannon.
Here’s a bunch of enthusiastic Woody Head amateur marine biologists, doing what comes naturally …
Happy new year, folks!