Highlights: 00:05:52 Plastic litter 00:39:20 Stalked crinoids 01:04:26 Sea pens 01:26:13 ROV collects sea pen 01:47:48 Cerianthid anemone 01:50:30 ROV collects bamboo coral

The substrate of the canyon floor is soft with carbonate substrate on the slope. At 2200 m the slope is steep and terraced and appears to be carbonate sediment with a thin veneer of sediment. Below 2230 m the fauna consists of holothurians and the echinoid Echinus sp., above this as the ground becomes harder, fine stalked crinoids and ophiuroids are the dominant species. At 2225 m in soft substrate fine stalked crinoids continue to be plentiful, along with sea pens and ophiuroids. On the upper slopes the soft coral Anthomastus grandiflorus and a variety of anemones including cerianthids and hormathiid anemones occur.

START VIDEO [00:00:00]/01:55 [1] The transect starts on mud with holothurians (Peniagone sp.) and echinoids (white Echinidae sp. , OTU559). [00:01:00] ROV moving right. [00:03:00] ROV moving forward. 5-6:00 Stopped for imagery at a barely visible carbonate ledge with plastic attached. [00:25:00] [2] areas of protruding carbonate terraced with heavy mud veneer. Stalked crinoids dominate the hard substrate while Peniagone sp . continues on the mud. [00:41:00]-[00:42:00] stop for imagery. [00:45:00] [3] mud with Democrinus sp . stalked crinoids and Ophiomusa lymani, sparse pebbles also present. [00:51:00] [4] mud upslope continues with Democrinus sp. , but now seapens become abundant (especially cf. Anthoptilum sp .). [01:08:00]-[01:19:00] ROV zigzags left/forward several times. [01:21:00]-[01:36:00] stopped for sampling sea pen and pushcores. [01:44:00] scattered cobbles and pebbles, some Chrysogorgiidae sp . also present. [01:48:00] stopped to sample Chrysogorgiidae sp until END VIDEO 03:49. Blue water transit uphill.

START VIDEO [01:54:00] [5] Similar to the prior assemblage, with continued upslope mud and scattered cobbles dominated by Democrinus sp. stalked crinoids. Now sea pens are sparse and Acanella arbuscula is more abundant with patchy and sometimes abundant Radicipes cf. gracilis whip corals. [02:01:00] ROV moving left/diagonally left, [02:03:00] ROV moving forward. [02:20:00]-[02:26:00] stop to sample Radicipes cf. gracilis. Continue forward until END VIDEO B [02:42:00]/05:29.