Highlights: 00:54:54 Orange roughy 00:55:53 Sea pen 01:25:22 Hexactinellid sponge 01:29:26 Hexactinellid sponge with zoanthid amenones 01:31:12 Bamboo coral with anemone 02:00:00 Antipatharian with chirostylids

Soft sediment covers the canyon floor and contains sea pens (incl. Umbellula sp.), cerianthids, echinoids, glass sponge (Hyalonema sp.) and white holothurians cf. Holothuroidea sp. 2 (from Howell & Davies 2010). On the steep canyon slope fauna is sparse consisting of cerianthids, echinoids, anemones and large sea pens; here burrows are also visible. On the downward slope burrows and cerianthids continue to occur but the fauna is dominated by a variety of sea pen species. The sponge Hyalonema sp. is present. Where rocks are present bamboo coral and sponges occur. Fish species are abundant and include grenadiers, sharks and a number of orange roughy.

As the ground rises again the substrate transitions from sand and rocks to rocks and steep cliffs with sediment overlay. Black coral including Parantipathes sp., Stichopathes sp. and Leiopathes sp. and glass sponges, some with yellow zoanthids, are present. On cliffs and overhangs, small clumps of the coral Solenosmilia variabilis occur, along with anemones including an unidentified smooth column hormathiid anemone, crinoids, bamboo coral, Stylasterid sp. and sponges.

START VIDEO [00:00:00]/23:44 [1] view is temporarily obscured by sediment in the water column, camera angle and ROV height are sub-optimal, partially due to moving downslope. Substrate is mud, with sparse mixed seapens and burrowing anemones/cup corals. Fish are abundant, especially Coryphaenoides rupestris and many juvenile Hoplostethus atlanticus. [00:01:50] Camera angles down more, view still partial (due to slope). [00:05:30] furrows suggestive of trawling activity in the area. [00:12:00] ROV descends and slows. [00:14:00]-[00:23:00] sampling two pushcores. [00:37:00] ROV reaches bottom of slope, [00:38:00] moving upslope on other side, continued mud and sparse seapens. [00:53:00] landscape now sloping down, ROV traversing down/along slope diagonally right. [00:58:00] slope is increasingly steep, still mud, sea pens. [01:03:00] ROV starts moving diagonally uphill. [01:15:00] first boulder. [01:16:00] [2] Transition to boulders/cobbles on steep slope, colonised with mixed corals, especially serpulid worms, yellow lamellate sponges (OTU623), and uncoiled Stichopathes sp. (OTU560). [01:18:00] Sloping bedrock. [01:19:00] Vertical bedrock cliffs, ROV ascends, then descends, and laterals along in front of the cliffs/slope. [01:22:00]-[01:24:00], [01:25:00]-[01:28:00] stops for imagery. [01:28:00] [3] Traversing along terrace edge, mixed corals on the vertical rock, seapens and cup corals on the mud veneered clopping shelf. [01:37:00] [4] ROV moves down cliff/slope. Some areas with discrete Solenosmilia variabilis communities, however again the dominant species were serpulid worms, yellow lamellate sponges (OTU623), and uncoiled Stichopathes sp . (OTU560). [01:57:00]-[01:59:00] stopped for imagery. [01:59:00] move backwards/right and downslope then stop for imagery until END VIDEO [02:00:00]/01:44