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FOUR AND MORE INTO ONE – Variation in Miamira moloch

Miamira moloch is a large to very large nudibranch of the Chromdorididae Family. It was first described as Ceratosoma moloch in 1988 by Rudman from two specimens, one collected from Heron Island, Central Queensland and the other from North Stradbroke Island, Southern...

REMARKABLE RHINOPHORES

When you don’t possess true eyes to recognise the shape of things, to see where you’re going, or what’s coming, then you must certainly have some other highly developed sense to survive. Living in a medium that has thousands of different compounds dissolved or...

STALKING WORMS – FEEDING BY Mariaglaja inornata

The Aglajidae are a carnivorous group of headshield sea slugs that actively hunt their prey. They are mostly fast moving in order to capture other sea slugs and polychaete worms. They are well-adapted for the task with clusters of sensory bristles located on the front...

Lookalikes to look out for – No. 1

Sometimes when reviewing images post-dive it’s easy to overlook an uncommon species if it has a similar appearance to a species that is frequently sighted. We know the common one well but have forgotten about the rarer one that looks similar – The Lookalike....

SIX SEPARATE SOCKETS – Hexabranchus

Hexabranchus sanguineus The name says it all. It has six gills – Hexabranchus, and is blood-coloured – sanguineus. This species was originally described from the Red Sea. Specimens from that region are not red and white mottled as in the images posted here...

AUTOTOMY – THE SELF SACRIFICE DEFENCE

Autotomy – the Self Sacrifice Defence   The ability to cast off a particular section of their anatomy, in order to facilitate escape from a predator, is possessed by a wide range of animals. Although the phenomenon, even in the Mollusca, had been recognized...

Rocky & back of TJ’s Boulders

DAY/DATE Thursday 16/1/20 SITE/S Rocky and back of TJ’s Boulders PARTICIPANTS Terry, David & Julie TYPE Subtidal   MODE Shore Entry   VESSEL More Mischief   DIVE 1 2 SITE/S Rocky TJ’s Boulders – back of SPECIES # 12 14 DURATION 66 Min 67 Min...

VIVA VARIATION – Hypselodoris bullockii & LOOK-ALIKES

VIVA VARIATION Change is upsetting    Repetition is tedious.       Three cheers for variation! Mason Cooley Across all of the Sea Slugs there is an almost endless amount of variation. Different shapes, sizes, textures, patterns and colours. We aficionados of the Sea...

THE LITTLE SCRAPER – THE RADULA

The Little Scraper Nearly all the sea slugs, just like nearly all the molluscs (except the bivalves), possess a radula in the buccal cavity for feeding. The radula is used not unlike a combination of teeth and tongue to rasp at, puncture, slash or grip the prey for...

SORTING OUT THE TRUE NUDIBRANCHS

Sorting out the True Nudibranchs   The Nudibranchs are but one order, the Nudibranchia, in the informal group that we refer to under the umbrella of Sea Slugs although common and popular usage has seen the term Nudibranchs used incorrectly to refer to all the sea...

THE EXCEPTION TO THE RULE – Phyllodesmium acanthorhinum

THE EXCEPTION TO “THE RULE” Phyllodesmium acanthorhinum is a rarely sighted, though widely distributed, species first recorded from Okinawa by Bob Bolland in 1987. The 15 mm long specimen pictured here was found in the Mooloolah River, southern Queensland, Australia...

CONGRESS ON CODIUM – Elysia maoria

CONGRESS ON CODIUM All of the sea slugs in the Sacoglossa order are herbivorous, well nearly all, a very few prey on the eggs of other sea slugs. However, that great majority that feed on plants do so by puncturing the cell walls of algae and sucking out the contents....

THE ANAL DUALITY OF THE NUDIBRANCHIA

The true nudibranchs are divided into two suborders – Suborder Cladobranchia and Suborder Doridoidea. Without doubt the most noticeable external difference between the two is in the appearance of the gills. Here we must generalise of course with the dorids having a...

WHAT PHYLLIDIID IS THAT?

Trying to decide to which genus a phyllidiid nudibranch belongs from a photo can be a task of some difficulty. There are some external features that can be used, but these are not always easily observed. Here is a rough external guide boiled down to the basics:...