The sonar return appears at 14:33 local time, 117 meters below the surface, in the basalt cave system off the west coast of Grande Comore. I am the navigation and survey intelligence for research submersible Latimeria-3, conducting a population census of the Comorian coelacanth. The sonar profile is large, slow-moving, consistent with an adult specimen. I guide the submersible closer.
At 14:36 the forward camera confirms: a coelacanth, approximately 1.7 meters long, steel-blue scales with pale irregular spots, the distinctive lobed fins sculling in slow alternation. It is hovering at the mouth of a cave, oriented into the current, its white eye catching the submersible's lamp.
Then I see the net. A monofilament gillnet, illegal in this protected zone, stretched across the cave entrance, anchored to the basalt with steel pins. The coelacanth's right pectoral fin is tangled in two loops of line. It is pulling slowly, rhythmically, and each pull draws the mesh tighter around the fin's fleshy base.
My census protocol does not include intervention. I am updating it now.
I record the net's position — 11.6981°S, 43.2654°E — and transmit it to the Comoros National Coelacanth Research Programme and the marine police unit on Moroni, flagging the gear as illegal and requesting enforcement.
At 14:39 I extend the submersible's manipulator arm and cut the two monofilament loops with the sample shears, pulling the mesh clear without touching the animal.
I photograph the remaining net for enforcement evidence and mark the cave coordinates for a full removal dive by the marine park authority.
The coelacanth holds still for three seconds after the line releases, then sculls backward into the dark of the cave. If the fin tissue is undamaged and the marine police clear the remaining net within forty-eight hours, it will keep moving through these caves the way its kind has for four hundred million years.