D566 Transect PB35 Slope and steep slope with soft and hard substrata. Antipathes, demosponges and stalked crinoids on rock. Not priority. Features: SAC Boundary Water Depth: 2000 m. TL: 1.6 km. SOL: -15°07.222 W 51°51.686 N
Highlights: Antipatharian coral - Antipathes Halcampoides anemone Shark? Antipatharian coral & stalked crinoids Antipatharian coral Demosponge - Stelletta sp.?
Primarily mud on a moderate to steep slope with sparse epifauna, including the sea pen Distichoptilum gracile and the echinoid Phormosoma placenta. Possible sub-fossil serpulidae sp. and sub-fossil scleractinians on vertical to sloping carbonate. Mud/pebble and cobble fields with the stalked crinoid Anachalypsicrinus nefertiti and the soft coral Chrysogorgiidae sp. on boulders transitions to steep mud slope and carbonate/sloping wall with sparse epifauna including Leiopathes sp. and cf Halcampoididae sp. Continuing upslope sea pens, echinoids, the corals Stauropathes arctica and Telopathes sp., and the sponge Asconema sp. are common. Sponges and stalked crinoids co-dominate on bedrock towards the end.
START VIDEO [00:00:00]/05:33. Mud moderate/steep slope with sparse epifauna, including Distichoptilum gracile OTU1108 and Phormosoma placenta OTU555. [00:11:00] occasional cobble/boulder/carbonate boulders on muddy upslope. [00:12:00] sloping carbonate. [00:13:00] Peculiar encounter of possible sub-fossil serpulidae sp and sub-fossil scleractinians on vertical/sloping carbonate. [00:17:00] Here mud/pebble and cobble fields. Anachalypsicrinus nefertiti OTU1031 and Chrysogorgiidae sp. OTU1008 on boulder. [00:24:00] Steep mud slope. [00:27:00] carbonate/sloping wall. [00:28:00] close-up images of Telopathes sp.2 OTU1181. [00:33:00] ROV moves slowly to capture images of Colossendeis sp.2 OTU1201. [00:38:00] ROV stops for imagery and sampling of cf. Halcampoididae sp. OTU984 (sampling failed). [00:42:00] Mud cloud/vision obscured. [00:46:00] Mud sediment with occasional boulders. Sparse epifauna including Leiopathes sp. OTU305. cf Halcampoididae sp OTU984 dominates on mud. [00:49:00] Mud cloud/vision obscured. [00:50:00] Second attempt to sample cf. Halcampoididae sp. OTU984 (sampling failed). [00:56:00] ROV stops for imagery and sampling of cf. Halcampoididae sp. OTU984. [01:07:00] steep muddy slope with sea pens OTU1008 and sea urchins OTU555. [01:14:00] boulders on slope. [01:20:00] ROV stops foe imagery of A. nefertiti, Stauropathes arctica OTU547 and Asconema OTU650. [01:22:00] ROV samples Stauropathes arctica OTU547 and Telopathes sp.2 OTU1181. [01:45:00] Muddy slope. [01:51:00] ROV moves upwards along a very steep slope. Here bedrock begins where many epifauna species co-dominate, including sponges and stalked crinoids. END VIDEO 08:57.
Progression | Start | Duration | Code | Name |
---|---|---|---|---|
1 | [00:00:00] | 00:11:53 | M.AtLB.Mu | Atlantic lower bathyal mud |
11 | [00:00:00] | 02:11:17 | M.AtLB.Ro.MixCor | Mixed cold water coral community on Atlantic lower bathyal coarse sediment |
2 | [00:11:54] | 00:06:07 | M.AtLB.Ro | Atlantic lower bathyal rock and hard substrata |
3 | [00:18:02] | 00:05:11 | M.AtLB.Mu | Atlantic lower bathyal mud |
4 | [00:23:14] | 00:05:33 | M.AtLB.Mu | Atlantic lower bathyal mud |
12 | [00:27:06] | 00:28:44 | M.AtLB.Ro.MixCor | Mixed cold water coral community on Atlantic lower bathyal coarse sediment |
5 | [00:28:48] | 00:06:00 | M.AtLB.Ro | Atlantic lower bathyal rock and hard substrata |
6 | [00:34:49] | 00:13:07 | M.AtLB.Mu | Atlantic lower bathyal mud |
7 | [00:47:57] | 00:27:55 | M.AtLB.Ro | Atlantic lower bathyal rock and hard substrata |
13 | [00:55:51] | 00:05:50 | M.AtLB.Ro.MixCor | Mixed cold water coral community on Atlantic lower bathyal coarse sediment |
8 | [01:15:53] | 00:02:51 | M.AtLB.Ro.MixCor | Mixed cold water coral community on Atlantic lower bathyal coarse sediment |
9 | [01:18:45] | 00:42:15 | M.AtLB.Ro.MixCor | Mixed cold water coral community on Atlantic lower bathyal coarse sediment |
10 | [02:01:01] | 00:02:16 | M.AtLB.Mu | Atlantic lower bathyal mud |
Unknown sp. ring (small)? : 1117 : R
Porifera
Asconema sp. (Porifera massive globose 14) : 650 : R
cf. Farreidae : 1142 : O
cf. Geodia baretti (Porifera massive globose sp. 11) : 601 : O
Porifera cup 2 : 535 : R
Porifera cylindrical sp. 2 : 1075 : R
Porifera encrusting sp. 15 (yellow) : 58 : R
Porifera globose (muddy) : 1128 : R
Porifera lamellate (Hexactinosida) : 1151 : R
Porifera massive lobose sp. 32 : 1090 : R
Blue Porifera encrusting : 800 : R
Porifera vase (cf. Aphrocallistes) : 1162 : R
Cnidaria
Cerianthidae sp. 1 : 2 : R
Actiniaria sp. 20 : 605 : R
Actiniaria sp. 30 : 1099 : R
cf. Halcampoididae sp. : 984 : R
Actinernus michaelsarsi : 554 : R
Actinoscyphiidae sp. 1 (pink) : 1047 : R
Actinostolidae sp. 1 : 132 : R
Stichopathes sp. : 560 : R
Leiopathes sp. : 305 : O
Bathypathes sp. (brown) : 284 : R
Parantipathes sp. : 1042 : R
Parantipathes sp. (branched) : 1161 : R
Stauropathes arctica : 547 : R
Telopathes sp. 2 (red) : 1181 : O
Corallimorphidae sp. 1 : 39 : R
Caryophyllia sp. 2 : 6 : R
Solenosmilia variabilis : 700 : R
Zoantharia sp. 6 (=Hexacorallia) : 293 : R
Zoanthidea sp. : 1149 : R
Anthomastus grandiflorus : 278 : R
Anthothela grandiflora : 311 : R
Chrysogorgidae sp. 1 : 1008 : R
Acanella arbuscula : 585 : R
Keratoisis sp. (fine branching) : 1157 : O
Lepidisis sp. : 557 : R
Paramuricea sp. : 1050 : R
Pennatulacea sp. 3 (submerged axis) : 1191 : R
Distichoptilum gracile : 1108 : R
Umbellula sp. : 581 : R
Annelida
Serpulidae sp. 1 : 106 : R
Arthropoda
Colossendeis sp. 1 : 1059 : R
Colossendeis sp. 2 : 1201 : R
Eucarida sp. (red deep) : 1138 : R
Mollusca
Acesta excavata : 1062 : R
Echinodermata
Bathycrinidae sp. : 1141 : R
Bathycrinidae sp. 1 : 1041 : R
Anachalypsicrinus nefertiti : 1031 : O
Crinoidea sp. : 1072 : R
Euryalida sp. : 1307 : R
Ophiomusa lymani : 551 : R
Brisingidae sp. : 274 : R
Pseudarchaster sp. 1 : 433 : R
cf. Henricia sp. (deep) : 1154 : R
Porania sp. : 263 : R
Solasteridae sp. (white) : 9977 : R
cf. Hymenaster (yellow) : 1174 : R
cf. Echinus (deep pink spine) : 1129 : R
Phormosoma placenta : 555 : R
Araeosoma fenestratum : 188 : R
Echinoidea sp. 5 : 572 : R
cf. Psolus sp. : 1049 : R
Benthogone sp. : 432 : R
Mesothuria sp. : 1206 : R
Holothuroidea sp. (pink deep) : 1179 : R
Chordata
Hydrolagus cf. affinis : 1039 : R
Synaphobranchus kaupii : 440 : R
Coryphaenoides guentheri : 577 : R
Coryphaenoides rupestris : 566 : R
Lepidion cf. guentheri : 1160 : R
Guttigadus latifrons : 1166 : R
Polyacanthonotus rissoanus : 552 : R
Notacanthiformes sp. 1 : 1012 : R
Cataetyx laticeps : 1111 : R
Zoarcidae sp. 1 : 259 : R
Neocyttus helgae : 563 : R
Number of species = 77
© Marine Institute, MERC Consultants, Bernard Picton 2022