Highlights: 00:18:24 Solenosmilia, sea fans, brisingids 00:32:00 Octopus 01:51:23 Antipatharian with chirostylids

This canyon had a sharp 100 m precipice on its northern slope; the floor is sandy with evidence of bioturbation. The southern slope is a 250 m steep incline with cliffs and vertical walls, at 1400 m the slope becomes more gradual with fine sandy sediment.

At the top of the northern slope are large bamboo corals, while further down this slope the stony coral Solenosmilia variabilis and the black coral Stichopathes sp. (straight form) occur. The fauna of the southern slope comprises sponges, including glass sponges, ophiuroids and crinoids with occasional sea pens, echinoids and the black corals Leiopathes sp. and Bathypathes sp. Large numbers of grenadier are present throughout, as are eel-like fish, oreos and a small orange roughy.

START VIDEO [00:00:00]/17:47 [1] The transect starts with the ROV moving downhill with partial/poor views of the seafloor which hosts mixed corals, including some large gorgonians, and multiple small discrete Solenosmilia variabilis colonies, on mud veneered bedrock and cobbles. [00:04:00] ROV turns to view slope, mud veneered bedrock, with coral rubble/pebbles [00:05:00] turn back away from slope and proceed downhill. [00:06:00] [2] Thicker mud, pebbles and some coral rubble, Ophiomusa lymani are abundant, with xenophyophores also present. [00:10:00] [3] another shelf edge, lined with corals (gorgonians and Solenosmilia variabilis), the ROV proceeds over ledge and descends before reaching the base of the steep slope and turning to face the slope [00:12:00]. Steep mud veneered bedrock hosts mixed corals such as Stichopathes sp. (OTU560), dense coral rubble is also found here with globose sponges associated. [00:23:00] Turn away from slope again to descend. [00:25:00] [4] shelf edge proceed over, [00:27:00] another shelf edge, [00:29:00] turn to face slope. Mud veneered bedrock and cobbles/boulders with mixed corals, especially Stichopathes sp . (OTU560), and Ophiomusa lymani. [00:31:00]-[00:33:00] stop for imagery of octopus. [00:33:00] back away from cliff/slope and turn away to descend again. [00:34:00] [5] bottom of steep slope, slope continues decreasing, mud with gravel and xenophyophores (Syringammina fragilissima). [00:37:00] small area of boulders/cobbles, mud veneered before continued mud/pebbles, xenophyophores. [00:45:00] mud/sand becomes rippled. [00:47:00] Zoroaster fulgens (robust morph) frequent amongst the xenophyophores. [00:52:00] Xenophyophores only dominant fauna, no longer rippled sediment. [01:06:00] small cobble/boulder area with corals, not enough for biotope change. [01:11:00] [6] large boulders with mixed corals, discrete Solenosmilia variabilis on the first, but Stichopathes sp. dominant over larger area. Landscape starts sloping upwards. [01:14:00] [7] upsloping mud/pebbles with xenophyophores. [01:17:00] [8] sloping/vertical bedrock with mud/pebble veneer in places. Stichopathes again dominant, along with yellow lamellate sponges (OTU623), Ophiomusa lymaniabundant where sediment veneered, Stichopathes sp. still present in these areas too. [01:51:00]- [01:52:00] stopped for imagery of Paragorgia sp. [01:54:00] [9] slope decreasing, mud/pebbles xenophyophores. [01:57:00] [10] small area of cobbles/boulders then bedrock shelf with mixed corals, again Stichopathes sp. dominates. [01:58:00] Mud/pebbles and xenophyophores. END VIDEO 19:47.

START VIDEO B [02:00:00]/19:49. Continued xenophyophores, with sediment becoming rippled at [02:09:00]. [02:11:00] stop for pushcores until END VIDEO [02:21:00]/20:10.