Marine Institute
SeaRover Dive Video

D664 Transect 30 Steep muddy/carbonate steep slope with echinoid and pteropod shells. Towards the end of the transect, muddy moderate slope with sparse epifauna. P1. Water depth: 2892m. Feature: Cliff areas

Highlights: Bamboo coral - Acanella Shrimp? Bamboo coral - Acanella Munidopsis sp. Purple sea urchin Crab - Neolithodes grimaldi Pink sea cucumber Pink sea cucumber swimming

Initially there is a steep slope of exposed bedrock with some soft sediment and scattered rocks. Further upslope, cliffs are apparent. Corals and stalked crinoids are observed on the cliffs. Asteroids and elpidiid holothurians present in soft sediment after the cliffs. Numerous grenadiers are present throughout.

START VIDEO [00:00:00]/00:45. Steep muddy/carbonate steep slope with echinoid and pteropod shells. Towards the end of the transect, muddy moderate slope with sparse epifauna. [1] Here steep muddy/carbonate steep slope with echinoid and pteropod shells. The ROV goes up on the cliff until the slope becomes less steep. And it continues on flatter slope. [00:10:00] Steep muddy slope with scarce epifauna. [00:38:00] here gullies on steep slope flank. [00:48:00] [2] Here the seafloor becomes less steep and [01:04:00] ROV stops for imagery of Neolithodes grimaldii. [01:11:00] ROV stops for imagery of Peniagone sp.. [01:18:00] Muddy moderate slope with sparse epifauna. [01:19:00] obscured/mud cloud. [01:24:00] Footage of Peniagone sp. swimming. [01:24:00] Obscured/mud cloud. END VIDEO [01:32:00]/02:13.

Progression Start Duration Code Name
1[00:00:00]00:48:31M.AtUA.RoAtlantic upper abyssal rock and other hard substrata
2[00:48:32]00:44:10M.AtUA.MuAtlantic upper abyssal mud

Cnidaria
Cerianthidae sp. 1 : 2 : R
Actinernus michaelsarsi : 554 : R
Bolocera tuediae : 12 : R
Stauropathes sp. 3 : 1208 : R
Telopathes sp. : 1043 : R
Chrysogorgidae sp. 1 : 1008 : R
Umbellula sp. : 581 : R
Arthropoda
Neolithodes grimaldii : 1063 : R
Majoidea sp. : 1121 : R

Munidopsis sp. : 1126 : R
Mollusca
Graneledone verrucosa : 973 : R
Echinodermata
Bathycrinidae sp. : 1141 : R
Pentametrocrinus atlanticus : 436 : R
Ophiomusa lymani : 551 : R
Ampheraster alaminos : 1143 : R
Zoroaster fulgens : 988 : R
Pterasteridae sp. : 1115 : R
Echinothuroidea sp. : 1094 : R

Peniagone sp. : 1167 : R
cf. Benthogone sp. (white) : 574 : R
Holothuroidea sp. (pink deep) : 1179 : R
Chordata
Coryphaenoides rupestris : 566 : R
Notacanthiformes sp. 1 : 1012 : R

Number of species = 23

© Marine Institute, MERC Consultants, Bernard Picton 2022