Sunday, July 12, 2015

Species List: Bornella Reef, SE corner Old Woman Island, Sunshine Coast, 11-07-2015

22 species sighted at Bornella Reef, SE corner Old Woman Island, Sunshine Coast.

Julie, Terry and David on this excursion consisting of 1 x 83 minute and 1 x 85 minute dives in water depths of 11 m to 14 m. 6 m viz, 18 C water temp and some surge. We all agreed that the drysuit is the best invention ever.

Once more the island beckoned. With the NW wind forecast to strengthen we opted to dive on the SE corner at a site we call Bornella Reef. Whilst there were hydroids present alas the Bornella specimens that gave their name to the site were not. Two specimens of Tambja victoriae were sighted one of which at 60 mm was amongst the largest we have observed in these waters. Favorinus sp. 1 popped up again. It has been placed in this genus for the sole reason that the rhinophores have cup-shaped annulations but the cerata do not seem typical.

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

Bulbaeolidia alba 1/-
Cadlinella ornatissima -/1
Dermatobranchus cf. primus 1/-
Favorinus sp. 1 1/-
Flabellina rubrolineata 1/1
Flabellina sp. 1 1/2
Goniobranchus cf. reticulatus -/1
Goniobranchus daphne 1/-
* Goniobranchus splendidus 7/9
Goniodoridella savignyi -/2
Hypselodoris jacksoni 1/1
Hypselodoris obscura -/2
Jorunna sp. 3 1/-
Phyllidia exquisita -/1
Phyllidia ocellata 1/-
Phyllidiella pustulosa 2/-
* Pteraeolidia ianthina 14/2
Roboastra luteolineata -/1
Tambja victoriae  -/2
Thuridilla splendens 1/2
Trinchesia ornata -/1
Trinchesia sibogae 1/-

Surface conditions at the island

Hypselodoris jacksoni

Phyllidia exquisita - or is it?

Yes! Note the gold edge to the mantle margin

Tambja victoriae

Healthy substrate

Goniobranchus splendidus - hard to believe 
they could match the Pteraeolidia ianthina in numbers

Hypselodoris obscura

Cadlinella ornatissima

Favorinus sp. 1

Dermatobranchus cf. primus

Goniobranchus daphne

Pteraeolidia ianthina - numbers were 
higher on the one side of of the reef finger

Trinchesia ornata

Roboastra luteolineata

Goniodoridella savignyi

Thuridilla splendens

Flabellina sp. 1