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Martina FuchsbergerTasmanien Blenny. This little fellow was quite happy to pose for the camera :D
Shot was taken with Canon A85 in Canon Housing, internal flash under Blairgowrie Pier, Port Phillip Bay, Melbourne, Australia in about 4m depth.

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Sam CooperGoblin Fish

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Brian MayesGreen eyed monster. (Nectocarcinus sp.)

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Brian MayesClose-up of Kuiter's Weedfish (Heteroclinus kuiteri)

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Brian Mayes"Hhmm....that looks interesting, I wonder if I can eat it".

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Brian MayesA juvenile Port Jackson Shark, resting before another session of terrifying the citizens of Blairgowrie, with it's poisonous dorsal spines. ;-)

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Andrew MacleodIt is not really Tasman Sea. It is Port Philip Bay, Melbourne Australia... and here is the surprise... 85% of species in Port Philip Bay are unique to the area. Melbourne is an understated, if cool, diving location.

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Dave Baxtermating time

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Andrew Macleodsea horse on Blaigowrie pier

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Brian MayesMy little pinky!

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Brian Mayes"Hey!....I think I may have discovered a wormhole to another galaxy"

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Brian MayesAs this Tasselled Anglerfish swims slowly by, it shows off all its fins and spines, maybe as a display to neighbouring anglerfish.

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Brian MayesWhen chased this Tasselled Anglerfish adopts a streamlined attitude with dorsal spines down, yet strangely with prominent lure (illicium).

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Bill Van EykLion Mane Jelly

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Bill Van EykSmall shrimp under pier

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Bill Van EykStargazer - slightly ugly fish -

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Bill Van EykPorcupine fish with a shrimp on its nose.  Never seen this before, it's probably just coincidental. But, it may be cleaning its left eye socket as it appears hollow. Once the shrimp swam away the socket and eye looked normal.

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Bill Van Eykblairgowrie, flabellina, nudibranch

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Andrew MacleodBlairgowrie pier, Port Philip Bay.

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Bill Van EykVery small (10mm) Phyllodesmium serratum, grazing on a sea-squirt "inlet". 
It looked like a fungus at first sight but when I looked closer it appeared a tiny nudibranch.

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Andrew Macleodhiding in his play ground.

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Bill Van EykLeatherjacket, trying to blend in with orange sponges. This photo taken as it turned around a pylon.

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Bill Van EykChromodoris tinctoria

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Bill Van EykCeratosoma amoenum

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Bill Van EykBig Belly Seahorse Posing

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Bill Van EykSmall marine insect - can anybody ID? Image taken about 1 meter deep.

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Bill Van EykAngler fish - great camouflage look for the eye

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Bill Van EykA lonely octopus sitting in an old tire: Octopus pallidus

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Bill Van EykSquid under pier during daytime with flash.

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Rob PeatlingRed Lined Flabellina. Taken November 7 2011. Blairgowrie Marina Port Phillip Bay.

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Bill Van EykBlenny returning to its favorite hideout under the pier.

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Bill Van EykBlenny - posing for the camera

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Bill Van EykSquid twins

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Bill Van EykEven seastars like VB Victoria Bitter (Beer).

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Bill Van EykPhyllodesmium serratum, Olympus  E-PL1, Macro Leica Elmarit F10 1/160, flash

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Theo RobotisJuvenile Xenocephalus australiensis

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Dave BaxterTasseled angler

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Dave Baxterbobbit squid

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Dave BaxterThe annual spider crab migration with diver

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Dave Baxterfat belly

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Dave Baxterdiver with stargazer