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Dive Report

27-01-2022 La Balsa Park

Jan 29, 2022

DAY/DATE

Thursday

27/01/2022

SITE/S

La Balsa Park

 

PARTICIPANTS

Julie, Terry & David

 

TYPE

Subtidal

 

MODE

Shore Entry

 

VESSEL

 

DIVE

1

 

SITE/S

La Balsa Park (Rotunda Entry)

 

SPECIES #

10

 

DURATION

120 Min

 

DEPTH/RANGE

To 5.2 m

 

TEMP.

27 C

 

VIS.

To 2.0 m

 

SURGE

 

CURRENT

Usual tidal run

 

COMMENTS & OBSERVATIONS

Very silty conditions encountered along this particular stretch of the La Balsa Park site. Species numbers are still low (both diversity and populations) although an increase in the hydroid growths was noticed.

Taxonomic Diversity:
5 of the 10 species sighted were aeolids. The 4 dorids comprised 3 x cryptobranchs (contract gill into a pocket) and 1 x phanerobranchs (unable to retract gill) with the remaining species being an arminid.

Our Historical data:
– 55 surveys conducted at this site since the first on 11/05/2014.
– Last surveyed 09/09/2021
– 166 species recorded by us at this site.
– Our most commonly recorded species at this site are: Goniodoridella sp. 1 (93%), Hypselodoris obscura (91%), and  Goniobranchus daphne (84%).
– This is the first time we have recorded Dermatobranchus oculus or Hypselodoris jacksoni at this site although both have been recorded at La Balsa previously.
– There appears to be a seasonal pattern to our sightings of Goniobranchus daphne at this site, with it being less prevalent in the winter months – see graph in image gallery.

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

TOTAL SPECIES SIGHTED: 10

 

SPECIES LIST – ALPHABETICAL

Cratena cf. lineata -2
Cratena lineata -3
Cratena sp. 07 -5
Dermatobranchus oculus -1 +
Eubranchus sp. 10 -2
Flabellina lotos -12
Goniobranchus daphne -7 #84%
Goniodoridella sp. 01 -3 #93%
Hypselodoris jacksoni -1 +
Hypselodoris obscura -15 #91%

SPECIES GROUPED BY ORDER

Nudibranchia
Cratena cf. lineata -2
Cratena lineata -3
Cratena sp. 07 -5
Dermatobranchus oculus -1 
Eubranchus sp. 10 -2
Flabellina lotos -12
Goniobranchus daphne -7 
Goniodoridella sp. 01 -3 
Hypselodoris jacksoni -1 
Hypselodoris obscura -15 

Cephalaspidea

Sacoglossa

Umbraculoidea

Pleurobranchoidea

Anaspidea

DIVE IMAGES GALLERY

PUT CURSOR ON IMAGE FOR SPECIES NAME
CLICK IMAGE TO ENLARGE & SCROLL