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18.11.2017 - 08:41 GABRIEL CREHAN Imperial du mileu dans la Calanques de Marseilles

Date of observation: 
17.07.2017
Name of location or dive site: 
Imperial du mileu dans la Calanques de Marseilles
Current: 
weak
Visibility: 
some suspended particles
Water Temperature: 
15℃
Vertical extent of the habitat: 
Min

20

(m)
Max

30

(m)
Observation Depth: 
20.00(m)
Maximum Dive Depth: 
30(m)
Horizontal extent of the habitat: 
more than 20 m
Orientation: 
E
Water temperature at predefined depths: 
Temperature: 
14.00℃
Meters: 
20.00(m)
Habitat continuity: 
Isolated Patch
Slope: 
horizontal
Rugosity: 
Small
Other observations : 

Difficile de plonger avec ma plaquette en mousse plastifiée.

Pendant les observations c'est très bien.

En revanche, à la maison c'est difficle à nettoyer - les marquages du crayon ne s'effacent pas completment. Il reste des traces pour la prochaine plongée. En conséquences des incertitudes à l'observation.....

 

Sinon, c'est ma premiere observation et je suis très content !!!

Pressures and Threats: 
Non-indigenous species: Caulerpa cylindracea (Absent)
Non-indigenous species: Asparagopsis spp. (Limited)
Mucilaginous aggregations (Extended)
Organism necrosis and mortality events (Absent)
Sedimentation on coralligenous biota (Absent)
Diver recklessness (Absent)
Fishing gear (Absent)
Litter (Absent)
Anchoring (Absent)
Urban waste sources nearby (Absent)
Other (Absent)
Coralligenοus Organisms: 
Eunicella cavolini (Very abundant)
Eunicella singularis (Scarce)
Paramuricea clavata (Absent)
Leptogorgia sarmentosa (Absent)
Savalia savaglia (Absent)
Shark eggs (Absent)
Anthias anthias (Absent)
Epinephelus marginatus (Absent)
Scorpaena spp. (Absent)
Centrostephanus longispinus (Absent)
Other sea urchins (Absent)
Calcareous red algae (Absent)
Peyssonnelia spp. (Absent)
Agelas oroides (Absent)
Axinella spp. (Absent)
Myriapora truncata (Absent)
Other erect bryozoans (Absent)
Scleractinians (Absent)
Cliona spp. (Absent)
Corallium rubrum (Absent)
Homarus gammarus (Absent)
Palinurus elephas (Absent)
Scyllarides latus (Absent)
https://cs.cigesmed.eu/sites/default/files/web_axinella_issaris_01.jpg,https://cs.cigesmed.eu/sites/default/files/web_axinella_issaris_05.jpg,https://cs.cigesmed.eu/sites/default/files/web_eunicella-cavolinii_issaris_01.jpg,https://cs.cigesmed.eu/sites/default/files/web_general_issaris_02.jpg,