Thursday, December 19, 2013

SpeciesList: NW Reef, Old Woman Island, 15-12-2013

28 species found at NW Reef Old Woman Island, Sunshine Coast.
2 dives each of about 58 minutes in water depths of 9m to 12m, 3m viz and 24c water temp. Considerable surge at times.


Julie, Terry & David guided some enthusiastic nudibranch hunters.
The long legs of Sunreef's dive boat 2 EZY took us comfortably out to our dive site. We asked the keen nudibranch lovers who joined us on this escapade if they wanted a nice cushy dive or did they want to find lots of nudibranchs. The chorus went up: "We want nudibranchs!". It was explained to them that if they could endure low viz and a bit of surge there would be heaps to see at Old Woman Island. The material in the water that produces the low viz provides the food for the creatures that nudibranchs eat so that's where they are to be found in great diversity. We ran out the dive reel upon the substrate for 40 metres and worked up and down it either side giving us a point of reference and also so we could all stay in contact and show each other what we found. 28 different species of sea slug were sighted all up - a most successful effort taking the viz and surge into consideration. The numbers shown for each species do not reflect all of those sighted as we were concentrating on variety and the surge and particles in the water were not conducive to the best photography.

Number of species sighted: 1st dive/2nd dive
*Species with highest specimen count

Bulbaeolidia alba -/1
Chromodoris splendida 2/-
Dendrodoris denisoni -/1
Diversidoris crocea 2/-
*Doriprismatica atromarginata 4/5
Doris sp. 1 -/1
Elysia maoria -/3
Glossodoris vespa -/2
Goniobranchus albonares -/1
Goniobranchus cf. reticulatus 1/-
Goniobranchus daphne 2/-
Goniobranchus geometricus -/1
Gymnodoris alba -/1
Hexabranchus sanguineus 1/-
Hypselodoris bullockii -/1
Hypselodoris jacksoni -/4
Hypselodoris obscura 1/1
Jorunna sp. 3 1/-
Mexichromis trilineata -/1
Miamira sinuata -/1
Phyllidia ocellata -/1
Phyllidiella lizae -/1
Phyllidiella pustulosa 2/2
Pleurobranchus peronii 1/-
Roboastra luteolineata 1/-
Tayuva lilacina 1/-
Thuridilla splendens 3/1
Tritoniopsis alba -/1

Thuridilla splendens

Chromodoris splendida

Pleurobranchus peronii

Roboastra luteolineata

Goniobranchus daphne

Diversidoris crocea

Hexabranchus sanguineus - juvenile

Hypselodoris obscura

Phyllidia ocellata

Doriprismatica atromarginata

Gymnodoris alba

Miamira sinuata

Glossodoris vespa

Hypselodoris bullockii

Dendrodoris denisoni

Tritoniopsis alba

Goniobranchus albonares

Bulbaeolidia alba

Tayuva lilacina

Goniobranchus cf. reticulatus

Mexichromis trilineata

Elysia maoria

Doris sp. 1 

Goniobranchus geometricus

Elysia maoria - lighter coloured