The viewport blooms blue. Naia leans toward the acoustic monitor. 'That pulse repeats every 43 seconds, but the animals are moving with it. Our oxygen is steady. The station marker isn't.' Something taps twice on the outside of the hull, far below the safe light range. 1. Record the pulse and compare the animal pattern 2. Follow the marker, staying inside the dive limit 3. Run a sonar check before moving 4. Your own move Status: Depth 600m | Oxygen 92% | Verified observations 0 Starters: Log the light pattern | Check the station beacon | Ask Naia what lives here