Marine Institute
SeaRover Dive Video

D690 Transect 7 Pheronema carpenteri aggregations on muddy slope. P1. Water depth: 1104m. Feature: Ridge

Highlights: Hexactinellid sponge - Pheronema and sea pen - Kophobelemnon Sea cucumber Hexactinellid sponge - Hyalonema

Of Note: Pheronema Aggregation.

Primarily soft sediment with a strong bottom current throughout. Dense aggregation of Pheronema observed with diverse infauna including brisingids, anemones (including Phelliactis & cerianthids) and sea pens (commonly Kophobelemnon). With the exception of Lepidion and the occasional eel, few fish species are present. Occasional bamboo coral Acanella and sponge Hyalonema. Where Pheronema was less dense holothurians, burrows and sea pens were common. Extensive sampling of Pheronema aggregation for University of Plymouth.

START VIDEO [00:00:00]/15:39. Pheronema carpenteri aggregations on muddy slope. [1] The ROV samples 15 sponges with three water samples and three push cores (more details of the samples are recorded in the enhancedOFOP files). [01:21:00] ROV stops for sampling Hyalonema sp1. END VIDEO [01:36:00]/17:13.

Progression Start Duration Code Name
1[00:00:00]00:01:33M.AtMB.Mu.DeeSpo.PheCarPheronema carpenteri field on Atlantic mid bathyal mud

Porifera
Hyalonema sp. 1 : 917 : R
Pheronema carpenteri : 347 : A
Cnidaria
Cerianthidae sp. 1 : 2 : R
Actiniaria sp. 1 : 4 : R
Actiniaria sp. 18 : 582 : R
Actiniaria sp. 20 : 605 : R
cf. Halcampoididae sp. : 984 : R
Phelliactis sp. 1 : 255 : R
Chrysogorgidae sp. 1 : 1008 : R
Acanella arbuscula : 585 : R
Pennatulacea sp. 3 (submerged axis) : 1191 : R

Kophobelemnon stelliferum : 442 : R
Pennatula aculeata : 1046 : R
Rhodaliidae sp. 1 : 950 : R
Annelida
Serpulidae sp. 2 : 228 : R
Arthropoda
Majidae sp. 1 : 11 : R
Munidopsis sp. : 1126 : R
Mollusca
Graneledone verrucosa : 973 : R
Hypsogastropoda sp. : 621 : R
Echinodermata
Pentametrocrinus atlanticus : 436 : R

Crinoidea sp. 1 : 131 : R
Zoroaster fulgens : 988 : R
Pseudarchaster sp. 1 : 433 : R
Echinothuroidea sp. : 1094 : R
Holothuroidea sp. (pink deep) : 1179 : R
Chordata
Ascidiacea sp. (clear) : 591 : R
Hydrolagus cf. mirabilis : 1024 : R
Synaphobranchus kaupii : 440 : R
Lepidion eques : 249 : R

Number of species = 29

© Marine Institute, MERC Consultants, Bernard Picton 2022