Definition of "non-buoyant" []

• Tending to sink in a liquid or fall in air (adjective)

WordNet. Princeton University. 2010.

• "Therefore spindly akas and non-buoyant amas are no longer of any use check the ferry in the top photo again and must be discarded in favour of far more buoyant and sturdy amas, as in photos 3 and 4."
• "The others swam, or in the case of non-buoyant animals like tortoises, they windsurfed until it was time for them to be rotated onto the boat."