Marine Institute
SeaRover Dive Video

D567 Transect PB36 Lophelia reefs and colonies on cobbles/boulders/carbonate/bedrock. Not priority. Features: SAC. Water Depth: 952 m. TL: 1.4 km. SOL: -15°01.819 W 51°51.725 N

Highlights: Fishing line Hexactinellid sponges & anemones Echiuran worm - Bonellia viridis, coral & fishing line Antipatharian coral Frogfish - Chaunax pictus Antipatharian coral - Bathypathes Frogfish - Chaunax pictus Crab - Paramola cuvieri

Cobble and gravel/rubble present with Lophelia pertusa and Leiopathes sp. occurred. Coral rubble is interspersed with mud, the echiuran Bonellia viridis dominates on moderate muddy slope. Discarded fishing rope observed. Moving up slow the substrata moves to bedrock crust with epifauna including scleractinians and zoantharians. Leiopathes sp., Stichopathes sp., sponges and sparse epifauna are encountered where the slope is steeper. On a very steep slope with a vertical wall a new species of Goosefish Lophiidae is encountered.

START VIDEO [00:00:00]/12:19. ROV is at the bottom and samples 2 pushcores. [00:08:00] ROV collects imagery of Flabellum sp. Here muddy upslope with sparse epifauna. [00:09:00] ROV collects imagery of marine debris/organic matter. [00:13:00] Here it collects imagery of hydrozoan OTU120. [00:17:00] Now occasional cobble and gravel/rubble. Sparse species of Hexacorallia such as Lophelia pertusa and Leiopathes sp. OTU305 on boulders. [00:17:00] ROV stops for imagery of epifauna living on boulder. [00:23:00] Here Bonellia viridis dominate on moderate muddy slope. [00:25:00] Coral rubble intersperse with mud. [00:31:00] Fishing rope. [00:31:00] Substrata changes into bedrock crust where many epifauna dwell including scleractinians and zoantharians. [00:39:00] Here mud and coral rubble intersperse with occasional bedrock. Leiopathes sp. and Stichopathes sp. are encountered. [00:41:00] Slope becomes steeper and steeper with sparse epifauna, including Leiopathes sp. and sponges. [00:44:00] Here mud is back as primary substrate. [00:50:00] Occasional cobble/boulders. [00:53:00] ROV stops imagery of new species of Lophiidae (poss. Chaunax pictus). [00:57:00] Here water column images. [00:58:00] Back to the sea floor. Sparse Leiopathes and Stichopathes on mud/coral rubble. [01:00:00] Here ROV stops for imagery of muddy/coral rubble sediment. [01:05:00] ROV goes down slope. Here mud is dominated by Bonellia viridis with occasional cobbles. [01:12:00] Now ROV goes up slope. [01:13:00] Bedrock crust with scleractinians on crusts’ edge. [01:14:00] Mud cloud/vision is poor. [01:16:00] Vision obscured. [01:17:00] Very steep slope with crust and coral rubble. [01:21:00] Again water column. [01:24:00] Back to the sea floor. ROV climbs a vertical wall/very steep slope. [01:26:00] Here predominantly muddy slope with occasional boulders. END VIDEO [01:51:30]/14:11.

Progression Start Duration Code Name
1[00:00:00]00:17:35M.AtMB.Mu.BurAneBurrowing anemone field in Atlantic mid bathyal mud
2[00:17:36]00:01:33M.AtMB.Ro.MixCorMixed cold water coral community on Atlantic mid bathyal rock and other hard substrata
3[00:19:10]00:00:45M.AtMB.Co.MixCorMixed cold water coral community on Atlantic mid bathyal coarse sediment
4[00:19:56]00:06:12M.AtMB.CoAtlantic mid bathyal coarse sediment
5[00:26:09]00:17:23M.AtMB.Bi.CorReeAtlantic mid bathyal cold water coral reef (biogenic structure)
6[00:43:33]00:05:15M.AtMB.MuAtlantic mid bathyal mud
7[00:48:49]00:30:45M.AtMB.Bi.CorReeAtlantic mid bathyal cold water coral reef (biogenic structure)
9[01:33:25]00:07:49M.AtMB.Bi.CorReeAtlantic mid bathyal cold water coral reef (biogenic structure)

Porifera
Asconema sp. (Porifera massive globose 14) : 650 : R
Aphrocallistes beatrix : 264 : R
Porifera encrusting sp. 1 (white) : 1 : R
Blue Porifera encrusting : 800 : R
Cnidaria
Cerianthidae sp. 1 : 2 : R
Actiniaria sp. 1 : 4 : R
Antipathes dichotoma : 1187 : R
Stichopathes cf. gravieri : 283 : R
Chrysopathes sp. Trissopathes sp. : 540 : R
Leiopathes sp. : 305 : R
Bathypathes sp. (brown) : 284 : R
Bathypathes sp. 1 : 328 : R
Parantipathes sp. : 1042 : R
Corallimorphidae sp. 2 : 43 : R
Lophelia pertusa : 250 : R
Flabellum sp. : 1056 : R
Anthomastus grandiflorus : 278 : R
Keratoisis sp. (fine branching) : 1157 : R

Gersemia sp. 3 : 1022 : R
Paramuricea sp. : 1050 : R
Corymorphidae sp. : 120 : R
Pliobothrus sp. : 207 : R
Annelida
Bonellia viridis : 267 : R
Arthropoda
Chirostylidae sp. 1 (indet.) : 285 : R
Paromola cuvieri : 304 : R
Munida tenuimana : 339 : R
Mollusca
Graneledone verrucosa : 973 : R
Teuthida sp. 1 : 1017 : R
Hypsogastropoda sp. : 621 : R
Bryozoa
Reteporella sp. : 204 : R
Echinodermata
Crinoidea sp. : 1072 : R
Pseudarchaster sp. 1 : 433 : R
cf. Henricia sp. (deep) : 1154 : R

Ceramaster/Peltaster/Plinthaster sp. 1 : 234 : R
Cidaris cidaris : 211 : R
Araeosoma fenestratum : 188 : R
Chordata
Ascidiacea sp. (clear) : 591 : R
Ascidiacea sp. 2 : 20 : R
Synaphobranchus kaupii : 440 : R
Molva molva : 654 : R
Lepidion eques : 249 : R
Guttigadus latifrons : 1166 : R
Mora moro : 349 : R
Phycis blennoides : 1020 : R
Chaunax pictus : 9991 : R
Trichiuridae sp. : 1303 : R
Helicolenus dactylopterus : 227 : R
Actinopterygii sp. 3 : 930 : R

Number of species = 48

© Marine Institute, MERC Consultants, Bernard Picton 2022