Oman - Novice Bay (Muscat)

Site record

• Dived 2024-05-20, Bandar Khayran / Muscat, Oman — one of the seven 2024 Oman survey sites reported in Mayfield (2025), Platax.
• A strongly zoned reef below a barren Muscat headland. Two of the twenty photographs are surface shots showing the dive boat moored against a bare, tan, scrub-dotted rock headland under a cloudless sky — they confirm the setting directly and leave eighteen underwater frames.
• This description is a full review of all twenty photographs from the dive.

Benthos

• A shallow flat of brain corals, lobophylliids, and Pocillopora thickets grades into slopes carpeted by Sarcophyton-type leather corals, then deep coralline buttresses and a rubble plain with sea whips.
• All three zones are represented across the twenty frames reviewed, and the transitions are sharper than four frames could show. The shallow flat frames are dominated by meter-scale meandering brain coral domes standing shoulder to shoulder; the mid-slope frames are close to a monoculture of cream and gray leather corals with only brain and Pocillopora heads emerging through them; the deep frames are dim, magenta-and-mauve encrusting sheets on coralline buttresses falling away into blue.
• The lobophylliid brain corals are photographed in close-up: two deep-maroon, thick-walled colonies pressed together on the flat, their fleshy ridged polyps unmistakable against surrounding tan branching coral.
• Pocillopora thickets carpet whole frames in dense lavender and gray-purple, with cauliflower heads packed edge to edge.
• A large continuous crimson coral field appears in one frame — deep red, knobby, and unbroken across the entire shot, an unusually vivid patch even by this site's standards.
• Soft corals are more varied than the leather corals alone: one frame is dominated by rust-red and orange bushy soft corals of the Dendronephthya type, and a blue-purple sea whip stands off the rubble in another.
• Deeper frames add foliose plating corals in whorled, lettuce-like tiers alongside the encrusting sheets and pale leather corals, in noticeably lower light.
• One frame is the site's diversity showcase: leather corals, brown branching Acropora, a vivid yellow-green branching Acropora, gray brain corals, and encrusting sheets all within a single frame width.

Stressors

• Beyond that trace and the bleached leather corals in Anderson's photographs, no bleaching was recorded at this site during the May 2024 survey, before the seasonal SST peak; NOAA Coral Reef Watch recorded Alert Level 2 heat stress and bleaching was reported along this coast from July 2024, weeks after the surveys.
• Bleaching was a trace: 0.2% of hard coral points.
• The twenty-frame set shows no clear candidate for that trace: the small branching colony on the upper margin of the crimson coral field is pale gray but pigmented, like the colonies around it.
• Typical recent thermal stress: mean annual maximum of 11.0°C-weeks (Degree Heating Weeks, 2021-2025, NOAA Coral Reef Watch; Gulf of Oman virtual station).
• On the leather-coral slope, a large stark-white ruffled leather coral sits beside tan colonies of the same form, and a pale lobed leather coral stands among ruffled ones; Anderson calls these bleached soft corals (e.g., Image 21, Image 22). The published survey (Mayfield 2025, Platax) lists bleached soft corals among the point-count labels not seen in its photographs; the bleached leather corals here are Anderson's own photo observation, and the published values are unchanged. The brain coral domes and the Pocillopora thickets show no paling.
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• A crown-of-thorns starfish was photographed on this dive, lying on coralline-crusted dead framework beside clumps of soft coral (e.g., Image 23); no fresh white feeding scars are visible beside it.
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Fauna

• Highlights included a resting green turtle, a banded sea snake, an ocellated nudibranch, and a camouflaged scorpionfish.
• The ocellated nudibranch is the standout photograph of the set: a pale mint-green dorid covered in raised tubercles, each ringed in bright orange, with a black-and-orange mantle margin and two erect rhinophores, crawling over an encrusted rubble patch dotted with orange sponges.
• A school of yellowfin goatfish was photographed in open blue water above the reef, and small cardinalfish shelter within the Pocillopora thickets.
• A large sea cucumber lies stretched across the top of a Pocillopora thicket in one frame, with others on the adjacent sand.
• Assorted wrasses, damselfish, and a butterflyfish move over the coralline buttresses in the deeper frames.

% cover

• Reference: Mayfield (2025)
• CoralNet submission package
• Published hard coral cover 39% (Mayfield 2025, Platax, Table 1; CoralNet point counts, mixed manual + automated, 30 points per photo, hard coral as a share of benthic points with water and fish excluded), with soft coral 22% and turf algae 12% on the same denominator.
• The twenty frames make that 22% soft-coral figure look entirely credible at this site, unlike at Daymaniyat Site 1: whole frames here really are carpeted in leather corals and bushy red soft corals, with hard coral reduced to emergent heads.
• Coral cover — external cross-reference (Reef Check). Two independent measurements, reported side by side and deliberately not averaged. Anderson Mayfield / CRD: 39% hard coral (2024). Reef Check: 14% at Novice Bay, Bandar Khayran, 0.06 km away (2017-2017, 1 survey). The two are 7 years apart (CRD later). Methods differ (CRD photographic/point-count index vs Reef Check point-intercept transect). Reef Check site positions are approximate; even with the positions coinciding, the two surveys may have sampled different patches of the same reef, which is the main caveat on this comparison.
• Zonation is a further caveat on any single site figure: a frame from the brain coral flat and a frame from the leather-coral slope would give completely different hard coral answers.

How to read the number

• The published 39% is a point count (mixed manual + automated) from Anderson Mayfield's own published work and carries the provenance of the paper it appears in.
• CoralSCOP works by summing the area fractions of its segmentation masks, and it segments coral-shaped objects. Standing dead skeleton scores as coral, so recently dead colonies can count as live coral to a mask-based method.
• The heavy soft-coral cover is the other hazard at this site: leather corals and Dendronephthya are neither hard coral nor bare substrate, and how each method treats them will drive much of the disagreement between the four.
• Neither the computer vision outputs nor the photographic point counts are diver transects.