Their bodies don’t ’shut off and die’. Being submerged is their Emergency Containment procedure, and they currently have 6 in containment. These things just don’t spit Acid or Hatch while underwater, and overall become a bit peaceful, when not trying to become unsubmerged. With no visible effect and these things hatching every < 7 minutes, what are the chances he drops an Egg in there, and keeps it in there long enough for Incap?
Also, quick question. Even if the affects of Fever Swamp aren’t instant, they’ve still got to trigger eventually. If the match is lasting for Days due to Stamina, shouldn’t the swamp still be unfair?