NA153_H2000_(1of3)_20230825T181314Z
Channel: Nautilus Live Dive Recordings
Date: 06/12/2023

This playlist includes recordings of all ROV Hercules dives conducted during a single Ocean Exploration Trust expedition aboard E/V Nautilus. Each dive is divided into two-hour segments. File names include:

Cruise ID_Dive Number_ File(XofX) _Date[yyyy-mm-dd]_Time[hhmmss]z

All files are recorded in UTC-0, the same way they are recorded by ROV Hercules' primary imaging camera.

The chapter observations presented were recorded in the data log in real-time by the scientists and data loggers aboard the ship. These are preliminary observations only. Data has not been QA/QCed or otherwise verified, and may be incomplete, contain inaccuracies, identification and spelling errors.

Scientific/research requests for the full video or for sub-sets of video can be made at https://nautiluslive.org/join/scientists-ashore-program. Please note that the YouTube videos may be incomplete and are not the full-resolution video. For press inquiries or licensing requests for reuse, please contact press@oet.org.

00:00:53 - 20230825T181408Z Objective: The primary objective of this ROV dive is to explore the eastern edge of the Johnston Atoll. This dive follows a proposed track which was planned for E/V Nautilus cruise NA141 - ROV exploration of Johnston Atoll, but unable to be executed due to poor weather conditions at the dive site in 2022. Consistent with the objectives of this expedition, during this dive we will: 1) survey a seafloor, 2) sample the diversity and distribution of deep-sea benthic communities, 3) survey and sample geologic features to better understand the geological structure, age, and volcanic history of formations within the region, and 4) acquire data to support PRIMNM
00:04:20 - 20230825T181734Z Note:  Pelagic_fish
00:05:51 - 20230825T181905Z Note:  School of same pelagic fish
00:18:11 - 20230825T183125Z Note:  Expecting carbonate reefs. Basalt is unexpected today
00:19:19 - 20230825T183233Z Note:  Parameucids and stony corals expected. Many species of fishes, sponges, and crustaceans unseen before on NA153as well.
00:26:56 - 20230825T184010Z Note:  Siphonophore
00:28:11 - 20230825T184125Z Note:  Siphonophore
00:34:08 - 20230825T184722Z Note:  Current here is 0.3 knots
00:34:13 - 20230825T184728Z Note:  Atoll increases the production here due to upwelling - increasing marine snow
00:35:51 - 20230825T184905Z Note:  Oxygen minimum zone - 24 umol/L 634-735 m
00:36:20 - 20230825T184934Z Note:  Increased organic matter increased bacterial activity
00:46:28 - 20230825T185942Z Note:  90 m off bottom
00:47:16 - 20230825T190031Z Note:  Shrimp
00:47:33 - 20230825T190047Z Note:  Jellyfish
00:49:19 - 20230825T190234Z Dive Status: onbottom
00:49:21 - 20230825T190235Z Dive Status: onbottom
00:51:23 - 20230825T190437Z Note:  Substrate quite sandy with rocks dispersed throughout
00:56:23 - 20230825T190938Z Note:  Attempting rock grab
00:57:07 - 20230825T191022Z Note:  Golden coral, shrimp, squat lobster
00:58:57 - 20230825T191212Z Note:  Squat lobster Tephlonida sp?
00:59:22 - 20230825T191236Z Note:  Rocks welded, moving on
01:00:49 - 20230825T191403Z Note:  Partially consolidated sediment slab
01:01:00 - 20230825T191414Z Note:  Shrimp
01:01:46 - 20230825T191500Z Note:  Sea_pen
01:05:08 - 20230825T191823Z Sample: NA153-191 Slurp Seapen (Pennatulacea) collected from sandy substrate
01:08:00 - 20230825T192115Z Note:  Abundant animal tracks in sediment
01:08:39 - 20230825T192153Z Note:  Suspected cat shark
01:08:46 - 20230825T192201Z Note:  Crinoid
01:11:23 - 20230825T192437Z Note:  Crinoid and Umbellula
01:11:58 - 20230825T192513Z Note:  Umbellula sea pen
01:12:47 - 20230825T192601Z Note:  Shrimp
01:13:39 - 20230825T192653Z Note:  Shrimp
01:14:17 - 20230825T192732Z Note:  3 shrimp on a carbonate rock
01:15:07 - 20230825T192821Z Note:  Shrimp
01:16:26 - 20230825T192941Z Note:  Sea_pen
01:16:30 - 20230825T192945Z Note:  Shrimp
01:17:27 - 20230825T193041Z Note:  Sea pen. Pagorid crab at base
01:18:08 - 20230825T193122Z Note:  Pennatulacea potential sea pen (prior collected)
01:18:37 - 20230825T193151Z Note:  2 more sea pens
01:18:58 - 20230825T193213Z Note:  Halosaur
01:19:39 - 20230825T193253Z Note:  Substrate hosts comparatively abundant shrimp and sea pens
01:20:21 - 20230825T193336Z Note:  Crangonidae - shrimp
01:20:56 - 20230825T193411Z Note:  Seapen_(Pennatulacea)
01:21:55 - 20230825T193510Z Note:  Attempting_pushcore
01:23:35 - 20230825T193649Z Sample: NA153-192 PushCore Sandy substrate pushcore
01:25:27 - 20230825T193841Z Note:  Substrate surprisingly deep in comparison to previous dives on NA153
01:25:42 - 20230825T193857Z Note:  shrimp
01:26:22 - 20230825T193936Z Note:  Rock hosting barnacles
01:26:45 - 20230825T193959Z Note:  Holothurian
01:28:37 - 20230825T194151Z Note:  Sea pen and shrimp (possibly Funiculina)