The undersea world isn’t as quiet as we thought, according to a New Zealand researcher. Fish can
“talk” to each other and make a range of 11 by vibrating their swim bladder, an internal gas-filled
organ used as a resonating chamber to produce or receive sound.
Fish are believed to speak to each other for a number of reasons, such as to attract mates, scare off
predators, or give directions to other fish. Damselfish, for example, have been found to make sounds to
scare off 12 fish and even divers. Another discovery about fish sounds is that not all fish are 13
“talkative.” Some species talk a lot, while others don’t. The gurnard species has a wide vocal repertoire
and keeps up a constant chatter. Codfish, 14 , usually keep silent, except when they are laying eggs.
Any goldfish lover who hopes to strike up a conversation with their pet goldfish is 15 . Goldfish
have excellent hearing, but they don’t make any sound whatsoever. Their excellent hearing isn’t
associated with vocalization.
【題組】12. (A) threatened (B) being threatened (C) threatening (D) being threatening
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