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Dive Reports

27-11-2023 Grays Bay

DAY/DATE

Monday

27/11/2023

SITE/S

Grays Bay

Bowen

 

PARTICIPANTS

Julie & Terry

 

TYPE

Subtidal

 

MODE

Shore Entry

 

VESSEL

 

DIVE

1

 

SITE/S

Grays Bay

 

SPECIES #

6

 

DURATION

140 Min

 

DEPTH/RANGE

3.7 m

 

TEMP.

28 C

 

VIS.

1 m

 

SURGE

Slight

 

CURRENT

Nil

 

COMMENTS & OBSERVATIONS

Taking a break from stair renovations we jumped in for a shore dive prior to a forced hiatus from diving for a couple of weeks. Once again we hoped to dive Horseshoe Bay, but the persistent winds resulted in the area being affected by swell and what appeared to be suspended silt. So it was back to Grays Bay where conditions were better although the visibility was not great. We persisted and followed the reef out, taking over 30mins to find our first slug. Numbers were scarce but we were happy to come out with 6 species, one of which we have not observed at this site before.

Taxonomic Diversity:
Five of the six species sighted were nudibranchs, with 4 being dorids comprising 1 x phanerobranch (non-retractile gill), 0 x porostome (suctorial feeder),  3 x cryptobranchs (retractable gill) and 1 was a cladobranch comprising 1 x aeolid, 0 x dendronotinid, 0 x arminid. 1 x sacoglossans complete the species count. If diet is considered only 3 of the 6 species sighted were spongivores.

Our Historical data:
– We have now completed 6 survey dives at Grays Bay since our first on 26/04/2023.
– We have recorded 13 species at this site.
– This is the first time we have recorded Murphydoris cobbi at this site.
– This site last surveyed on 12/11/2023.

Guide to Symbols:
+++ New Species
+ First time sighted in Whitsundays
# Most commonly sighted at this site with %

TOTAL SPECIES SIGHTED: 6

 

SPECIES LIST – ALPHABETICAL

Baeolidia variabilis -1
Chromodoris lineolata -3
Doriprismatica atromarginata -1
Hypselodoris roo -1
Murphydoris cobbi -1
Plakobranchus ocellatus -1

SPECIES GROUPED BY ORDER

Nudibranchia
Dorids
Phanerobranchs
Murphydoris cobbi -1  
Cryptobranchs
Chromodoris lineolata -3
Doriprismatica atromarginata -1
Hypselodoris roo -1
Porostomes

Cladobranchs
Aeolids
Baeolidia variabilis -1
Arminids

Dendronotinids

Cephalaspidea

Sacoglossa
Plakobranchus ocellatus -1

Umbraculoidea

Pleurobranchoidea

Anaspidea

DIVE IMAGES GALLERY

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