We descend to 30 m and wait for the sunfish to appear from the depths. The visibility is poor, maybe five or six meters. The dawn is rising, and there is no sun to speak of. Depth and cold quickly kill our determination. After twenty minutes of idle waiting, my buddies start leaving one by one, either because of hypothermia or running out of the air. But I stay put.
Suddenly two flecks below us take on a darker shade of blueish-green. Two sunfish rise to the cleaning station and let the Mexican hogfish perform their cleaning duty, picking parasites from their skin.
No, we did not stick to the rules. Being excited, cold, and intoxicated with nitrogen, we did not wait for the sunfish to settle and we fired our strobes too early. Both animals disappeared in a few seconds. Only a single viable image remained from this encounter with this elusive specimen of Galapagos wildlife.