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| About | Mapping | Dive list | Listed species | Pressures | Species - OTUs |
D575 Transect PB21 Dense Lophelia reefs on steep slope with various species of Antipathes. Priority. Features: SAC, Mound. Water depth: -850 m. TL: 1.7 km SOL: 12° 34.505' W 52° 12.907' N
Highlights: Lophelia & antipatharian coral - Antipathes Sailfin rough shark Lophelia & antipatharian coral - Antipathes Dense Lophelia & yellow sea fan
Muddy sediment on a flat to gently sloping gradient on which echinoids dominate. Species present include Cidaris cidaris, Kophobelemnon stelliferum and Caryophyllia sp. Areas of dense reef comprising of both Lophelia pertusa and Madrepora oculata occur. At the mound summit in particular this reef is dense and well established.
START VIDEO [00:00:00]/07:56. [1] Mud flat/gentle slope. Sea urchin OTU1119 dominates. Present species include Cidaris cidaris OTU211 and Kophobelemnon stelliferum OTU442. ROV stops for sampling 2 pushcores. Here shoal of fish swims in front of the ROV in a tornado-shape (unknown species). [00:58:00] [2] Mud/pebble/cobbles on steep hill. Cf. Psolus sp. OTU1049 is dominant on cobbles. [01:13:00] [3] Lophelia pertusa reef/framework on steep slope. Mostly dead. Leiopathes sp OTU305 dominates. [01:38:00] [4] Dense L. pertusa/M. oculata reef. Caryophyllia sp OTU6 frequently encountered in this part of the transect. [01:40:00] ROV reaches the mound summit. [5] Here coral reef is dense and well established. ROV moves slowly, possibly for imagery of L. pertusa reef. [01:53:00] ROV approaches to descend the hill on the other side. [6] Here coral reef still present. Leiopathes sp. OTU305 dominate. END VIDEO [02:00:28]/09:57.
| Progression | Start | Duration | Code | Name |
|---|---|---|---|---|
| 1 | [00:00:00] | 00:59:59 | M.AtMB.Mu | Atlantic mid bathyal mud |
| 2 | [01:00:00] | 00:01:59 | M.AtMB.Mu | Atlantic mid bathyal mud |
| 3 | [01:02:00] | 00:13:17 | M.AtMB.Bi.CorRee | Atlantic mid bathyal cold water coral reef (biogenic structure) |
| 4 | [01:15:18] | 00:45:11 | M.AtMB.Bi.CorRee.LopFra | Mixed coral assemblage on Atlantic mid bathyal Lophelia pertusa reef framework (biogenic structure) |
Porifera
Asconema sp. (Porifera massive globose 14) : 650 : R
Aphrocallistes beatrix : 264 : R
Stryphnus fortis : 657 : R
Porifera encrusting sp. 1 (white) : 1 : R
Porifera encrusting sp. 15 (yellow) : 58 : R
Blue Porifera encrusting : 800 : R
Cnidaria
Cerianthidae sp. 1 : 2 : R
Pachycerianthus multiplicatus : 458 : R
Unknown Anthozoa (yellow) : 1028 : R
Actiniaria sp. 1 : 4 : R
Actiniaria sp. 20 : 605 : R
Sagartidae sp. (wide oral disc) : 1118 : R
Bolocera tuediae : 12 : R
Phelliactis sp. 1 : 255 : R
Antipathes dichotoma : 1187 : R
Stichopathes cf. gravieri : 283 : O
Leiopathes sp. : 305 : R
Corallimorphidae sp. 2 : 43 : R
Caryophyllia sp. 2 : 6 : R
Lophelia pertusa : 250 : O
Madrepora oculata : 251 : R
Epizoanthus sp. 1 (Paguridae associated) : 317 : R
Acanthogorgia cf. armata : 608 : R
cf. Clavulariidae sp. : 289 : R
Plexauridae sp. (deep) : 1192 : R
Gorgonacea sp. 7 (pink) cf. Isidella : 307 : R
Kophobelemnon stelliferum : 442 : R
Annelida
Bonellia viridis : 267 : R
Arthropoda
Chirostylidae sp. 1 (indet.) : 285 : R
Paromola cuvieri : 304 : R
Munida sarsi : 200 : R
Paguridae sp. : 205 : R
Bathynectes sp. : 235 : R
Mollusca
Graneledone verrucosa : 973 : R
Teuthida sp. 1 : 1017 : R
Echinodermata
Koehlermetra porrecta : 315 : R
Brisingidae sp. : 274 : R
Stichastrella rosea : 198 : R
Ceramaster/Peltaster/Plinthaster sp. 1 : 234 : R
Pterasteridae sp. : 1115 : R
cf. Echinus (deep pink spine) : 1129 : R
Echinidae sp. (dark) : 1119 : R
Cidaris cidaris : 211 : F
cf. Psolus sp. : 1049 : R
Benthogone sp. : 432 : R
Parastichopus tremulus : 266 : R
Chordata
Ascidiacea sp. (clear) : 591 : R
Galeus melastomus : 1005 : R
Leucoraja sp. : 1067 : R
Oxynotus paradoxus : 9984 : R
Hydrolagus cf. mirabilis : 1024 : R
Synaphobranchus kaupii : 440 : R
Nezumia aequalis : 1003 : R
Lepidion eques : 249 : R
Mora moro : 349 : R
Phycis blennoides : 1020 : R
Lophius piscatorius : 273 : R
Trichiuridae sp. : 1303 : R
Trachyscorpia cristulata : 1216 : R
Helicolenus dactylopterus : 227 : R
Actinopterygii sp. 3 : 930 : R
Number of species = 61
© Marine Institute, MERC Consultants, Bernard Picton 2022