What critical internal feature is absent in the Yellowfin Tuna, requiring constant swimming for depth maintenance?
Answer
Swim bladder
The Yellowfin Tuna physiologically lacks a swim bladder, which is an organ utilized by many other bony fish species to regulate buoyancy passively and maintain depth without continuous energy expenditure. Because this gas-filled organ is absent, the Yellowfin tuna must rely entirely on constant, active swimming to maintain its precise position within the water column. This requirement dictates its perpetually active lifestyle and hunting behavior. Furthermore, this anatomical difference means that if a Yellowfin tuna is brought rapidly to the surface from deep waters, it is highly vulnerable to barotrauma compared to species that possess a functional swim bladder.
Related Questions
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