Fish ears evolved from a pressure-sensing swim bladder linked to an otolith

Evidence

In those ancient pullulating seas, the otolith hooked up with the swim bladder via a bone not unlike the ossicles linking our inner and outer hearing membranes. Finally the ensemble of bladder and otolith became, in certain species, a functioning ear, picking up and analyzing vibrations that the bladder received from mechanical motions of water outside the fish’s body. — George Michelsen Foy, Zero Decibels, 341

Categorization

• corroborated: 2 independent passages support this claim — George Michelsen Foy, Zero Decibels: The Quest for Absolute…, 341
• XREF: connects to: Humans internally carry oceanic sound because we evolved from aquatic ancestors — George Michelsen Foy, Zero Decibels: The Quest for Absolute…, 607; Snakes evolved a lung-based auditory system found in no other land vertebrate — Almo Farina, Soundscape Ecology: Principles,…, 1792; Fish ear bone growth rings reveal reactions to water temperature. — Robin Wall Kimmerer, Braiding Sweetgrass: Indigenous Wisdom,…, 922

Broader Connections

• Humans internally carry oceanic sound because we evolved from aquatic ancestors #corroborates (0.75) — George Michelsen Foy, Zero Decibels, 607