What pair of fins is structurally absent in the wolffish body plan due to its benthic specialization?
Answer
Pelvic fins
The absence of pelvic fins is a key morphological trait that distinguishes the wolffish and reflects its commitment to a seafloor existence. Most bony fishes rely on pelvic fins for crucial stability and maneuvering during swimming in the water column. By omitting these fins, the wolffish sacrifices the agility necessary for pelagic movement. Instead, they rely on a strong, continuous dorsal fin and a continuous anal fin for propulsion and maintaining position, favoring the stable, anchoring presence required when navigating and resting on the seafloor substrate.
Related Questions
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