Marine Institute
SeaRover Dive Video

D651 Transect 40 Muddy steep slope with mixed polychaetes and scattered sea pens. P1. Water Depth: 3000m. Feature: Slope, depth

Highlights: Octocoral - Anthomastus & brittlestars Anemone - Bolocera sp.? Sea pen Sea pen Spiral trace

Soft sediment throughout the dive. Numerous burrows and occasional pteropod shells are present. The main faunal components are worm tubes and holothurians. Occasional sea pens, echinothuiroids and elpidiids occur. The soft coral Anthomastus is observed as are some decapods and fish including grenadiers and scabbards. One or two cup corals observed; attempts made to collect one failed. No cores taken for technical reasons.

START VIDEO [00:00:00]/08:55. Muddy steep slope with mixed polychaetes and scattered sea pens. [1] the entire dive is dominated by a single biotope muddy slope with scattered epifauna, including soft corals and anemones, and infauna (e. g. Lanice sp. 1). [00:00:00] ROV stops for pushcore sampling, though aborted for a minor core box issue. [00:03:00] Sea cucumber faeces observed. [00:06:00] ROV stops for core sampling but aborted same core box issue as at the beginning of the day. [00:15:00] vision obscured. [00:28:00] vision obscured again. [00:35:00] ROV stops for imagery of anemone. [00:42:00] ROV stops for sampling anemone. [01:00:00] ROV stops for sampling Pennatula aculeata. [01:08:00] ROV stops for sampling sea pen. [01:34:00] ROV stops for imagery of spiral shaped faeces. [01:44:00] ROV starts its way up to the surface. END VIDEO [00:01:48]/10:42.

Progression Start Duration Code Name
1[00:00:04]01:48:06M.AtUA.Mu.InfPolMixed infauna dominated by polychaetes in Atlantic upper abyssal mud

Foraminifera
Syringammina fragilissima : 261 : R
Cnidaria
Actiniaria sp. 20 : 605 : R
Flabellum sp. : 1056 : R
Pseudoanthomastus sp. : 1080 : R
Primnoidae sp. (unbranching) : 1193 : R
Pennatula aculeata : 1046 : R
Virgularia mirabilis : 385 : O

Annelida
Lanice sp. 1 : 262 : O
Arthropoda
Caridea (indet.) : 1077 : R
Echinodermata
Crinoidea sp. 1 : 131 : R
Euryalida sp. : 1307 : R
Ophiomusa lymani : 551 : F
Echinoidea sp. 5 : 572 : R

Peniagone sp. : 1167 : O
Chordata
Coryphaenoides guentheri : 577 : R
Halosauridae sp. : 1113 : R

Number of species = 16

© Marine Institute, MERC Consultants, Bernard Picton 2022