Highlights: 00:01:15 Aphroditid worm moving and shaking bristles 00:52:58 Solenosmilia reef 00:58:07 Solenosmilia reef with hexactinellid sponges & antipatharian corals 01:24:50 Hexactinellid sponges 01:44:16 Hexactinellid sponges & bamboo coral 02:01:10 Brisingid starfish 02:04:49 Large yellow sea fan 02:07:47 Hexactinellid sponge - Asconema 02:11:39 Sea fan 02:37:35 Stylasterid coral & anemones 02:43:03 Canon ball 02:53:30 Hexactinellid sponge with zoanthid anemones 02:57:48 Sea fan 03:54:28 Hexactinellid sponge - Pheronema

Soft substrate of the canyon floor is dominated by xenophyophores, sea pens, echinoids, Acanella sp., eels and grenadiers. On the slope dropstones are colonised by sponges, Hyalonema sp., and anemones, transitioning into an area of coral rubble and stones where small glass sponges and soft coral are more common. At the base of a distinct 30 m high carbonate pinnacle Solenosmilia variabilis is recorded while at its pinnacle sponges and soft corals occur.

Moving along a steep rock cliff the bivalve Acesta excavata, sponges and clumps of S. variabilis occur. In an area of boulders with bamboo corals, the black coral Leiopathes sp. along with very large specimens of sponges are present. There is a wide diversity of species here including ophiuroids, hormathiid anemones, the soft coral Anthomastus sp., hydroids, Pycnogonids, Galatheidae sp. and echinoids, including Cidaris cidaris. These boulder areas alternate with areas of soft sediment to the top of the canyon, the latter containing xenophyophores and sponges.

START VIDEO A [00:00:00]/03:59 [1]: The dive starts in a soft bottom coral garden of cup corals on rippled sand. Acanella arbuscula and xenophyophores are also present. Rare boulders and cobbles present with mixed corals and encrusting fauna. [00:49:00] [2]: A steep slope and stack-like bedrock outcropping feature host a predominantly dead Solenosmilia variabilis reef framework with mixed corals and sponges, and living discrete S. variabilis on rock. [01:36:00] [3]: low-lying bedrock hosts mixed corals, mosaicked with a larger area of mixed mud/pebbles dominated by xenophyophores. [01:38:00] [4]: continues to mud where xenophyophores continue, along with A. arbuscula, mixed sea pens, and cup corals. Occasional rocks. [01:42:00] [5]: low-lying bedrock hosts mixed corals and erect sponges and is dominated by a lamellate sponge (OTU606) and serpulids among other fauna. [01:48:00] [6]: more mud with occasional boulders, again soft substrate corals especially A. arbuscula and cup corals, while boulders continue the lamellate sponge and mixed corals assemblage. [01:58:00] [7]: dense cobbles and pebbles, with some boulders/protruding bedrock, the same hard bottom assemblage continues. END VIDEO A 05:58.

START VIDEO B [01:59:00]/05:59 [8]: back to boulders and protruding bedrock with (mature) mixed corals and erect sponges interspersed with erect corals on soft sediment. [02:12:00] [9]: a steeper slope displays mixed dead S. variabilis framework and bedrock protrusions with mixed corals and sponges (especially Aphrocallistes sp) continuing around a large bedrock protrusion. [02:20:00] [10]: traverse along some cliffs, serpulids again dominating, but continued mixed corals/sponges. [02:32:00] [11]: Continuing over the top of the cliffs, soft sediment slope hosts A. arbuscula and xenophyophores while occasional boulders/protruding bedrock hosting mature mixed corals and sponges. [02:45:00] [12]: xenophyophores are now dominant, occasional hard substrate as before. [02:49:00] [13]: a Psolus squamatus dominated sparse encrusting assemblage occupies a slope of cobbles/boulders/pebbles. [02:51:00] [14]: bedrock cliffs, again dominated by serpulids and mixed mature corals and sponges. The top of the cliffs transitions into a similar assemblage on cobbles/boulders with greater dominance of P. squamatus, but the mixed corals and sponges continue. [03:30:00] [15]: patchy hard substrate continues with smaller corals and sponges, while sparse A. arbuscula dominates intermediate areas of mud. [03:46:00] [16]: an extended area of xenophyophores on mud. [03:48:30] [17]: bedrock protrusions continuing into a cobble/boulder field host again mature mixed corals and sponges, especially lamellate sponges. END VIDEO B 07:59.

START VIDEO C [03:59:00]/08:00. [17 ctd]. [04:01:00] [18]: another extended area of xenophyophores and soft sediment with sparse rock substrate. [04:05:00] [19]: dense cobbles boulders, then cobbles/boulders on flat mud, again host mixed corals and sponges and encrusting community with A. arbuscula sparsely interspersed . [04:27:00] [20]: rippled sand begins as the slope inclines, occasional urchins and fish species dominate. [04:30:25] [21]: dense cobbles/boulders on sand slope/carbonate crust slope/ mixed/coarse sediment plateau continue the mixed coral and sponge assemblage. END VIDEO C [04:48:00]/08:48.