Section 01 · Active Subject
Select Your Diver
Eight true seals (family Phocidae) — the earless, deep-diving pinnipeds, from the record-breaking elephant seals to the imperilled monk seals. Spin the dial. Your choice drives every readout on this page.
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Section 02 · The Dive Column
Descend
Scroll to sink your subject through the water column — or grab the depth slider. Watch the lungs collapse, the heart slow to a crawl, and the light vanish. Release to ascend on a decompression curve.
Section 03 · Scale
Size Comparison
Your subject against a human freediver, a scuba diver, and an orca — all drawn to true relative length on a shared baseline. Toggle references in and out.
Section 04 · Performance Envelope
Depth × Duration
Each point is one species: maximum dive time against maximum depth. Elephant and Weddell seals sit alone at the bottom-right — staggering endurance at staggering pressure.
| Species | Max depth (m) | Max dive (min) |
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Section 05 · Physiology
Anatomy of a Dive
The mammalian dive reflex, rendered as hardware. Probe each system to see how a seal survives pressures that would crush a submarine hull.
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Section 06 · Conservation
Population & Status
Indexed abundance trends, 2000 → 2025 (relative to a 2000 baseline of 100). Scrub the year. Most species are stable; the Hawaiian monk seal carries an Endangered flag.
Range — —
—Section 07 · Field Challenge
Earn Your Station Badge
Six questions, drawn straight from this console's own data. Answer to certify.
Section 08 · Field Notes
Threat Ledger
Primary pressures by species. Click a column header to sort (keyboard-operable).
| Species | Family | IUCN | Est. population | Primary threat | Threat index |
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Sources & Methodology
- IUCN Red List of Threatened Species — pinniped assessments (2024).
- Costa & Williams — diving physiology of marine mammals.
- Kooyman et al. — Weddell seal dive records, McMurdo Sound.
- Hindell et al. — southern elephant seal dive telemetry (~2,133 m).
- NOAA Fisheries — Hawaiian monk seal recovery program.
- Dive figures are documented maxima; physiology readouts are illustrative models from published parameters.
Station
ABYSSAL is a self-contained instrument: one HTML file, no network, all art rendered live on canvas. Every number is real and traceable to the sources at left.