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Dive Report

18-09-2022 Nudi Retreat

Sep 27, 2022

DAY/DATE

Sunday

18/09/2022

SITE/S

Nudi Retreat
Currimundi reef

 

PARTICIPANTS

Terry, David

 

TYPE

Subtidal

 

MODE

Boat Dives

 

VESSEL

Rebel II

 

DIVE

1

2

SITE/S

Nudi Retreat

Nudi Retreat

SPECIES #

12

13

DURATION

65 Min

73 Min

DEPTH/RANGE

12-16 m

12-16 m

TEMP.

20 C

20 C

VIS.

12 m

12 m

SURGE

Slight

Slight

CURRENT

Nil

Nil

COMMENTS & OBSERVATIONS

It has been 3 months since our last Sunshine Coast survey. Weather conditions, other engagements, overseas diving and Reef Check surveys have kept us otherwise occupied. We crossed the new Bribie Bar without incident the channel being at the northern end of the bar hard up against the southern shore of the breakaway section of Bribie Island. Conditions were conducive for relaxing and enjoyable diving with whale songs heard throughout both dives as they are now making their way south, close inshore. Some new gear was being tested as well, including a redundant air supply and emergency radio and EPIRB. The abundance of the small Tambja tenuilineata is certainly worth highlighting.

Taxonomic Diversity:
16 of the 17 species sighted were nudibranchs, all bar one (an aeolid) being dorids comprising 3 x phanerobranch (non-retractile gill), 4 x porostomes (suctorial feeders and all Phyllidiidae family) and 8 x cryptobranchs (retractable gill) (all belonging to the Chromodorididae family). The other single non-nudibranch sea slug species was a cephalaspidean (headshield slug). If diet is considered then 14 of the 17 species sighted are spongivores.

Our Historical Data:
– This excursion brings the survey number to 36 at this site since we commenced fully recording data here on 08/05/2011.
– 136 species have been recorded at this site.
– Each of the species seen on these two dives have been recorded by us at this site previously.
Ardeadoris egretta is a rare sighting however, having been recorded by us at this site only once previously on 14/01/2012.
– Our most common sightings at this site are: Phyllidiella pustulosa (92%), Doriprismatica atromarginata (89%), Phyllidia ocellata (81%), and Goniobranchus splendidus (78%).
– The species count and abundance has remained fairly constant over the period covered by our surveys.
– This site last surveyed on 18/02/2022.

Key to symbols
+++ New Species
+ First time sighted at this site
# Most commonly sighted at this site with %

TOTAL SPECIES SIGHTED: 17 (12/13)

 

SPECIES LIST – ALPHABETICAL

Ardeadoris egretta -/1
Cadlinella ornatissima 1/-
Chromodoris kuiteri 5/-
Doriprismatica atromarginata 3/6 #89%
Glossodoris rufomarginata -/2
Goniobranchus albonares -/1
Goniobranchus splendidus 1/2 #78%
Hexabranchus sanguineus 1/-
Hypselodoris jacksoni 1/1
Phyllidia ocellata -/2 #81%
Phyllidia picta 1/1
Phyllidia varicosa 1/3
Phyllidiella pustulosa 4/4 #92%
Pteraeolidia semperi -/1
Sagaminopteron ornatum 1/1
Tambja tenuilineata 4/24
Roboastra luteolineata 1/-

SPECIES GROUPED BY ORDER

Nudibranchia
Ardeadoris egretta -/1
Cadlinella ornatissima 1/-
Chromodoris kuiteri 5/-
Doriprismatica atromarginata 3/6 
Glossodoris rufomarginata -/2
Goniobranchus albonares -/1
Goniobranchus splendidus 1/2 
Hexabranchus sanguineus 1/-
Hypselodoris jacksoni 1/1
Phyllidia ocellata -/2 
Phyllidia picta 1/1
Phyllidia varicosa 1/3
Phyllidiella pustulosa 4/4 
Pteraeolidia semperi -/1
Tambja tenuilineata 4/24
Roboastra luteolineata 1/-

Cephalaspidea
Sagaminopteron ornatum 1/1

Sacoglossa


Umbraculoidea

Pleurobranchoidea

Anaspidea

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