D480 Transect 49 Rippled sand/mud with burrowing anemones, small area with mixed substrate (gravel/pebbles) and trawl marks. Features of Interest: predicted Lophelia reef Water Depth: 795-758 m
Highlights: Halcampoides anemone Chimaera Fish Anglerfish - Lophius piscatorius
The seafloor is initially soft, flat rippled sediment dominated by small black and large purple cerianthids. Further up the slope there is evidence of bioturbation and large complex burrows. Lepidion eques, grenadiers, scorpion fish, monkfish and sea pens are evident. Ling appeared in association with localised ridges.
START VIDEO [00:00:00]/02:52 [1] Sand/mud sediment with burrowing anemones, dominated by abundant cf. Halcampoididae sp . (OTU984) and large Bolocera-like sediment dwelling anemones (Actiniidae sp, OTU41). The sea pen Virgularia mirabilis is also encountered several times. [00:21:00] anemones continue but are sparser. [00:27:00] start encountering burrows, likely dug by crustaceans. [00:29:00] the first of multiple trawl marks. [00:33:00] [2] rare cobbles and then gravel/pebbles are mixed with the soft sediment, Pachycerianthus multiplicatus is now dominant. [00:49:00] [3] return to sand/mud with no obvious dominant fauna although epifauna is occasionally encountered (e. g. P. multiplicatus, asteroids, Parastichopus tremulus). [01:02:00] [4] sediment again has some cobbles and gravel/pebble constituent, still no dominant fauna. [01:49:00] stopped to sample two pushcores before END VIDEO [01:56:00]/04:48.
Progression | Start | Duration | Code | Name |
---|---|---|---|---|
1 | [00:00:00] | 00:33:18 | M.AtMB.Mu.BurAne | Burrowing anemone field in Atlantic mid bathyal mud |
2 | [00:33:19] | 00:16:00 | M.AtMB.Mu.BurAne | Burrowing anemone field in Atlantic mid bathyal mud |
3 | [00:49:20] | 00:13:36 | M.AtMB.Sa | Atlantic mid bathyal sand |
4 | [01:02:57] | 00:53:39 | M.AtMB.Mx | Atlantic mid bathyal mixed sediment |
Cnidaria
Cerianthidae sp. 1 : 2 : O
Pachycerianthus multiplicatus : 458 : O
cf. Halcampoididae sp. : 984 : F
Sagartidae sp. (wide oral disc) : 1118 : O
Bolocera tuediae : 12 : R
Actiniidae sp. (sand Bolocera) : 41 : F
Actinauge richardi : 499 : O
Adamsia sp. : 1066 : R
Epizoanthus sp. 1 (Paguridae associated) : 317 : O
Virgularia mirabilis : 385 : O
Corymorphidae sp. : 120 : R
Annelida
Serpulidae sp. 1 : 106 : R
Arthropoda
Chaceon affinis : 254 : O
Paguridae sp. : 205 : O
Caridea (indet.) : 1077 : R
Munnopsurus giganteus : 152 : R
Mysida (indet) : 1026 : R
Mollusca
Octopoda (indet.) : 659 : R
Echinodermata
Asteronyx loveni : 471 : R
Stichastrella rosea : 198 : R
Luidia sp. : 448 : R
Echinidae sp. (dark) : 1119 : R
Echinidae sp. (pink) : 194 : R
Parastichopus tremulus : 266 : O
Chordata
Chimaera monstrosa : 265 : O
Synaphobranchus kaupii : 440 : F
Argentinidae sp. 1 : 1188 : R
Molva molva : 654 : R
Nezumia aequalis : 1003 : O
Coelorinchus caelorhincus : 303 : O
Lepidion eques : 249 : O
Phycis blennoides : 1020 : O
Lophius piscatorius : 273 : O
Helicolenus dactylopterus : 227 : O
Actinopterygii sp. 4 : 1006 : R
Number of species = 35
© Marine Institute, MERC Consultants, Bernard Picton 2022