Highlights: 00:09:19 Trawl marks 00:41:32 Trawl marks 00:54:02 Trawl marks 02:03:23 Boulders with barnacles 02:21:00 Bolocera 02:27:59 Phelliactis anemone

The sediment on the canyon floor is sandy with ripples and scattered coarse substrate. Echinoids, cerianthids, grenadiers, small eels, Lepidion eques and purple anemones dominate but are sparsely distributed. Sharks and a large ling are present.

Dropstones and rocks occur towards the upper slopes of the canyon sides. Moving down the far side of the feature the substrate is that of rocks and pebbles. Most of the rocks are colonised by large barnacles. The sediment at the base of the feature is that of flat featureless sand.

START VIDEO A [00:00:00]/14:37 [1] The first two thirds of this transect are spent over relatively flat mixed gravel/pebbles/cobbles on mud/sand with sparse/patchy urchins (especially OTU 194). This area has been heavily trawled. The 64 clearest furrows are marked in the enhanced OFOP file. The ROV generally moves in a diagonal right direction but frequently zigzags to track along a trawl mark/furrow. One particularly deep furrow (probably made by an otter board) can be seen at: [00:52:00]- [01:02:00] when the ROV follows the furrow, stopping at [00:53:00] to test the sediment and at [00:55:00] taking two pushcores inside and outside of the mark. The furrows are often indicated by rippled mud/sand surrounded by gravel/pebbles/cobbles. Deeper furrows sometimes have mud mounds alongside, presumably due to some hydrodynamic effect of an otter board passing through. [01:48:00] [2] The continuing relatively flat mixed substrate, with more frequent boulders becomes dominated by barnacles . END VIDEO A [02:06:00]/16:44.

START VIDEO B 16:45 Continued barnacle encrusted rock/mixed substrate until END VIDEO B 24:00/17:10.