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Dive Reports

07-06-2024 Innaminka Rock

DAY/DATE

Friday

07/06/2024

SITE/S

Innaminka Rock
Bowen 

 

PARTICIPANTS

Terry & Julie

 

TYPE

Subtidal

 

MODE

Boat Dives

 

VESSEL

Rebel II

 

DIVE

1

2

SITE/S

Innaminka Rock

Innaminka Rock

SPECIES #

15

6

DURATION

97 Min

58 Min

DEPTH/RANGE

8.8 m

7.6 m

TEMP.

23 C

23 C

VIS.

5 m

8 m

SURGE

Nil

Nil

CURRENT

Nil

Nil

COMMENTS & OBSERVATIONS

The good weather continues and we got the boat out today. We headed for Innaminka Rocks hoping that the critter abundance would be high. We had a slight current today which was more annoying than anything else but the area that yielded the high diversity last time is now covered in dense, tall, algae, making the search really difficult. We moved slightly closer in and slightly east for the second dive and found more coral and rubble patches with not as much algae. Although we found a few critters the species count was still disappointingly low.

Taxonomic Diversity:
All 18 of the species sighted were nudibranchs, and all were dorids comprising 8 x porostome, all phyllidiids (suctorial feeders), 1 x phanerobranchs (non-retractile gill), 9 x cryptobranch, all Chromodorodidae family (retractable gill). If diet is considered 17, of the total of 18 species, were spongivores.

Our Historical Data:
– We have now completed 4 surveys and have recorded 36 species at this site since our first survey here on 4/03/2024.
Ignoring the undescribed phyllidiids, which we still have under review:
– This is the first time we have recorded Chromodoris sp. 6, Goniobranchus aureopurpureus, Goniobranchus decorus, Hypselodoris emma, or Phyllidiella granulata ? TBC, in the Whitsundays;
– This is the first time we have recorded Hypselodoris obscura or Trapania vitta at this site.
– We last surveyed this site on 4/03/2024.

Note on phyllidiids:
The Phyllidiella sp. a in the species lists below refers to a taxonomic-cryptic species delineated in the paper:
Papu, A., Bogdanov, A., Bara, R., Kehraus, S., Konig, G., Yonow, N. & Wagele, H. (2022). Phyllidiidae (Nudibranchia, Heterobranchia, Gastropoda): an integrative taxonomic approach including chemical analyses. Organisms Diversity & Evolution. https://doi.org/10.1007/s13127-021-00535-7
At the time of publishing this report we are in the process of reviewing all of our Phyllidiella records to align them with the findings of the above paper.

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

TOTAL SPECIES SIGHTED: 18

 

SPECIES LIST – ALPHABETICAL

Ceratosoma tenue 1/-
Chromodoris sp. 6 2/- +
Goniobranchus aureopurpureus 1/- +
Goniobranchus decorus 1/- +
Hypselodoris bullockii -/1
Hypselodoris emma 1/- +
Hypselodoris obscura 1/-
Hypselodoris whitei -/1
Phyllidia coelestis 4/4
Phyllidia guamensis 4/2
Phyllidia sp. 4 2/-
Phyllidiella cf. pustulosa 1/-
Phyllidiella granulata 2/- ? TBC +
Phyllidiella sp. a 2/-
Phyllidiella sp. d 2/-
Phyllidiella sp. e complex -/1
Trapania vitta 1/1
Verconia simplex 1/-

SPECIES GROUPED BY ORDER

Nudibranchia
Dorids
Phanerobranchs
Trapania vitta 1/1
Cryptobranchs
Ceratosoma tenue 1/-
Chromodoris sp. 6 2/-
Goniobranchus aureopurpureus 1/-
Goniobranchus decorus 1/-
Hypselodoris bullockii -/1
Hypselodoris emma 1/-
Hypselodoris obscura 1/-
Hypselodoris whitei -/1
Verconia simplex 1/-
Porostomes
Phyllidia coelestis 4/4
Phyllidia guamensis 4/2
Phyllidia sp. 4 2/-
Phyllidiella cf. pustulosa 1/-
Phyllidiella granulata 2/- ? TBC
Phyllidiella sp. a 2/-
Phyllidiella sp. d 2/-
Phyllidiella sp. e complex -/1

Cladobranchs
Aeolids

Arminids

Dendronotinids
– 

Cephalaspidea

Pteropoda

Sacoglossa


Umbraculoidea

Pleurobranchoidea

Anaspidea

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