Marine Institute
SeaRover Dive Video

D571 Transect PB30 Mud sediment interspersed with boulders. Anemone Phelliactis sp. is dominant epifauna. Micromesistius poutassou is the dominant pelagic species. Priority. Features: Mounds, NPWS selected. Water depth: -335 m. TL: 3.5 km SOL: 14° 17.485' W 52° 2.986' N

Highlights: Anemone - Phelliactis Blue whiting Anemone - Actinauge richardi Spectacular shoal of blue whiting

Muddy sediment with occasional cobbles and boulders and frequent crustaceans. The anemone Phelliactis sp., the asteroid Porania pulvillus and the holothurian Parastichopus tremulus and Serpulidae sp.

START VIDEO [00:00:00]/10:25. Mud cloud as soon as the video starts. [1] Muddy sediment with occasional cobbles/boulder on up slope. Parastichopus tremulus OTU266 dominate. [00:09:00] [2] Cobbles on mud down slope. Crustaceans are frequent among rocks. [00:10:00] [3] Again mud slope. [00:13:00] [4] Cobbles/boulders on mud slope. P. tremulus dominate. In some rocks, Phelliactis sp. OTU255 dominate. [00:15:00] [5] Mud sediment. [00:16:00] [6] Large boulders host Phelliactis sp., Porania pulvillus OTU263 and Parastichopus tremulus. [00:18:00] [7] Mud sediment on slope. [00:20:00] Occasional cobble/boulders. [00:25:00] Boulders on up slope host serpulidae sp and P. tremulus. [00:30:00] Mud cloud. [00:31:00] ROV stops for imagery of cf. Clavulariidae sp OTU289. [00:34:00] Here dense colony of Actinauge richardi OTU499 on large boulders. [00:36:00] [8] Mud sediment again. [00:40:00] [9] Again colony of A. richardi on boulders and cobbles. [00:42:00] Large boulders/bedrock. A. richardi dominate. [00:45:00] [10] Mud slope. [00:47:00] [11] Boulders host A. richardi. [00:48:00] [12] From this point a plethora of Micromesistius poutassou OTU439 persist throughout the rest of the dive. At time vision is obscured due to mud cloud flared by fish. END VIDEO [00:01:30]/11:55.

Progression Start Duration Code Name
2[00:10:12]00:01:06M.AtUB.RoAtlantic upper bathyal rock and other hard substrata
3[00:11:19]00:03:09M.AtUB.MuAtlantic upper bathyal mud
4[00:14:29]00:02:02M.AtUB.RoAtlantic upper bathyal rock and other hard substrata
5[00:16:32]00:01:20M.AtUB.MuAtlantic upper bathyal mud
6[00:17:53]00:01:51M.AtUB.RoAtlantic upper bathyal rock and other hard substrata
8[00:41:37]00:03:22M.AtUB.MuAtlantic upper bathyal mud
9[00:45:00]00:07:02M.AtUB.RoAtlantic upper bathyal rock and other hard substrata
10[00:52:03]00:02:07M.AtUB.MuAtlantic upper bathyal mud
11[00:54:11]00:01:15M.AtUB.RoAtlantic upper bathyal rock and other hard substrata
12[00:55:27]00:34:50M.AtUB.MuAtlantic upper bathyal mud

Porifera
cf. Geodia baretti (Porifera massive globose sp. 11) : 601 : R
Cnidaria
Pachycerianthus multiplicatus : 458 : F
Bolocera tuediae : 12 : R
Actinauge richardi : 499 : R
Phelliactis sp. 1 : 255 : R
Caryophyllia sp. 5 (bullseye) : 584 : R
Iridogorgia sp. : 9997 : R
Funiculina quadrangularis : 444 : R
Annelida
Serpulidae sp. 1 : 106 : R
Arthropoda
Nephrops norvegicus : 443 : R

Mollusca
Cephalopoda sp. : 73 : R
Cephalopoda sp. : 73 : R
Hypsogastropoda sp. : 621 : R
Echinodermata
Leptometra celtica : 437 : R
Koehlermetra porrecta : 315 : R
Stichastrella rosea : 198 : R
Pseudarchaster sp. 1 : 433 : R
Ceramaster/Peltaster/Plinthaster sp. 2 : 388 : R
Porania sp. : 263 : R
Cidaris cidaris : 211 : R
Araeosoma fenestratum : 188 : R
Mesothuria intestinalis : 536 : R

Parastichopus tremulus : 266 : R
Chordata
Galeus melastomus : 1005 : R
Argentinidae sp. 1 : 1188 : R
Micromesistius poutassou : 439 : F
Pollachius virens : 9983 : R
Macrouridae sp. (cf. Coelorhynchus) : 1172 : R
Mora moro : 349 : R
Phycis blennoides : 1020 : R
Lepidorhombus boscii : 441 : R
Helicolenus dactylopterus : 227 : R

Number of species = 32

© Marine Institute, MERC Consultants, Bernard Picton 2022