Marine Institute
SeaRover Dive Video

D562 Transect PB33 Madrepora/Lophelia colonies on cobble. Predominantly muddy sediment with occasional cobbles/boulders. Priority. Feature: Mounds. Water Depth: 700 m. TL: 1.0 km. SOL: -14°35.841 W 50°05.610 N

Highlights: Fish - juvenile scabard? Fish Anglerfish - Lophius piscatorius Fish Squid Crab - Chaceon affinis Red anthozoan, yellow anthozoan & stylasterid corals

Coral rubble (<10% living Madrepora) with stalked anemones, Cidaris cidaris and urchins occurs here. Other fauna include the soft coral Anthomastus sp., the crab Bathynectes sp., holothurians, and juvenile scabbard fish. On soft sediment with pebbles and coarse sand, C. cidaris, Calveriosoma gracile and holothurians are noted. The occasional drop stone is colonised by stylasterids. Fish species include monkfish, blackmouth cat shark and Lepidion eques.

START VIDEO [00:00:00]/17:51. [1] Coral rubble on muddy sediment with isolated colonies of Madrepora oculata OTU251 on cobbles. Alcyonacea sp.3 OTU343 and Ceriantharia OTU1069 frequently encountered on coral rubble. [00:16:00] ROV tilts camera to the water column. Vision of sea floor suspended. [00:17:00] Vision back to normal. [00:20:00] vision obscured. Adjusting camera zooming. [00:21:00] [2] Here muddy sediment/gravel with scattered cobbles. Sea urchin OTU211 on muddy sediment. [00:39:00] Sea urchin OTU1129 bed on muddy flat/gentle upslope. [01:03:00] Encounter with listed IUCN species Orange Roughy. [01:28:00] Organic material/debris on muddy upslope. [01:31:00] [3] Gravel/muddy/scattered boulders. Pliobrothus sp. OTU207, and Holothuroidea sp. (pink deep) OTU1179 co-dominate. [01:50:00] ROV stops for imagery on seabed and sampling one pushcore. END VIDEO [01:54:40]/19:46.

Progression Start Duration Code Name
1[00:00:00]00:21:28M.AtMB.Bi.CorReeAtlantic mid bathyal cold water coral reef (biogenic structure)
2[00:21:29]01:02:49M.AtMB.MuAtlantic mid bathyal mud
3[01:24:19]00:02:51M.AtMB.Ro.BarComBarnacle dominated community on Atlantic mid bathyal rock and other hard substrata
4[01:27:11]00:04:16M.AtMB.Co.MixCorMixed cold water coral community on Atlantic mid bathyal coarse sediment
5[01:31:28]00:08:41M.AtMB.CoAtlantic mid bathyal coarse sediment
6[01:40:10]00:14:37M.AtMB.CoAtlantic mid bathyal coarse sediment

Porifera
Porifera encrusting sp. 1 (white) : 1 : R
Blue Porifera encrusting : 800 : R
Cnidaria
Cerianthidae sp. 1 : 2 : R
Pachycerianthus multiplicatus : 458 : R
Unknown Anthozoa (red) : 1215 : R
Unknown Anthozoa (yellow) : 1028 : R
Actiniaria sp. 1 : 4 : R
Adamsia sp. : 1066 : R
Caryophyllia sp. 2 : 6 : R
Lophelia pertusa : 250 : R
Madrepora oculata : 251 : O
Epizoanthus sp. 1 (Paguridae associated) : 317 : R
Alcyonacea sp. 3 : 343 : O
Anthomastus grandiflorus : 278 : R
Pliobothrus sp. : 207 : R
Arthropoda

Chaceon affinis : 254 : R
Paguridae sp. : 205 : R
Bathynectes sp. : 235 : R
Cirripedia sp. 1 : 82 : R
Eucarida sp. (red deep) : 1138 : R
Mollusca
Colus sp. : 113 : R
Teuthida sp. 1 : 1017 : R
Echinodermata
Pseudarchaster sp. 1 : 433 : R
Ceramaster/Peltaster/Plinthaster sp. 1 : 234 : R
cf. Echinus (deep pink spine) : 1129 : R
Cidaris cidaris : 211 : O
Araeosoma fenestratum : 188 : R
Benthogone sp. : 432 : R
Parastichopus tremulus : 266 : R
Holothuroidea sp. (pink deep) : 1179 : O
Chordata

Galeus melastomus : 1005 : R
Deania calcea : 1139 : R
Synaphobranchus kaupii : 440 : R
Hoplostethus atlantica : 651 : R
Lepidion eques : 249 : R
Mora moro : 349 : R
Phycis blennoides : 1020 : R
Lophius piscatorius : 273 : R
Notacanthiformes sp. 1 : 1012 : R
Trichiuridae sp. : 1303 : R
Helicolenus dactylopterus : 227 : R
Actinopterygii sp. 3 : 930 : R

Number of species = 42

© Marine Institute, MERC Consultants, Bernard Picton 2022