Ryu wasn't idiotic to rely on his non-working nose to find his way to the others if he got lost. His sense of smell didn't work underwater, but dropping pieces of stones and shells every twenty meters or so was another way to ensure that he wouldn't get lost.
He wasn't tired, and he wasn't hungry. His beast side had enough stamina to last him a week without food and rest. Instead, he was afraid that if he rested, his mind would wander to Cecily and Ferris. If that happened, he'd be restless, and he still couldn't rest even if he wanted to.
Ryu needed to move and do something. Where it be finding the lost Jewel or treasures or Cecily and the others.
"Ryu, wait up."
Seraphina swam to his side, and Ryu had to wonder why she wasn't the least bit exhausted? Was she really a mortal?
"What's wrong?" Ryu asked.
"I'll go with you since I'm worried that you'll get lost. And besides, I'm not tired and want to explore as well."