Beneath the water lies a whole world of sound: snorts, boops, croaks, grunts. Fish, it turns out, have a lot to say, and they’ve been communicating for a long time. In this episode, we take a dive with some of the planet’s oldest vertebrates&nbsp;Threshold is nonprofit, listener-supported, and independently produced. You can support Threshold by<a href="https://www.thresholdpodcast.org/donate" rel="noopener noreferrer" target="_blank"> donating today</a>. To stay connected,<a href="https://www.thresholdpodcast.org/newsletter" rel="noopener noreferrer" target="_blank"> sign up for our newsletter</a>.We want to hear from you! Send us your questions about the new season, the content or how it’s made, for an upcoming behind-the-scenes episode. You can submit your questions to <a href="mailto:outreach@thresholdpodcast.org" rel="noopener noreferrer" target="_blank">outreach@thresholdpodcast.org</a>&nbsp;Special thanks to Lauren Hawkins, Miles Parsons, and Tim Lamont for many of the fish recordings. Clara Amorim and Raquel Vasconcelos recorded the Lusitanian toadfish, Herbert Tiepelt recorded the pikeperch percussionist, and Marta Bolgan provided the “unknown kwa.” Additional recordings came from more than a dozen other scientists, many of whom have contributed sounds to the website <a href="https://fishsounds.net/" rel="noopener noreferrer" target="_blank">Fishsounds.</a>Here are the fish sounds we used in the episode:<a href="https://fishsounds.net/sound.js?id=f9f367b8-49cc-4767-9e35-64b48b5b3826" rel="noopener noreferrer" target="_blank">160000_Parsons_Blackspotted croaker chorus</a><a href="https://fishsounds.net/sound.js?id=dbadeb8c-d5af-483b-af51-4d25ec0f68ca" rel="noopener noreferrer" target="_blank">130000_Picciulin_Brown meager_Chorus</a><a href="https://fishsounds.net/sound.js?id=8d07ba99-0d48-4676-ac77-9734476f5175" rel="noopener noreferrer" target="_blank">180000_Pine_Unknown_Chorus</a><a href="https://fishsounds.net/sound.js?id=c8026b0f-a355-4956-bba3-3e1241f6d847" rel="noopener noreferrer" target="_blank">170000_Parsons_Unknown_Chorus</a><a href="https://fishsounds.net/sound.js?id=a8a3da4d-6f23-496d-a0f2-38d8dfc1d61c" rel="noopener noreferrer" target="_blank">180000_Dilorio_Unknown_Kwa Chorus</a><a href="https://fishsounds.net/sound.js?id=3d447d38-5b47-4db1-a172-1d04acf3268b" rel="noopener noreferrer" target="_blank">190000_Bolgan_Unknown_Kwa</a><a href="https://fishsounds.net/sound.js?id=469c079f-648d-47f6-9b1a-f48a69032220" rel="noopener noreferrer" target="_blank">050000_Tiepelt_Pike-perch_Scrape</a><a href="https://fishsounds.net/sound.js?id=26f78a50-cb84-451b-a04f-b302ed22f2a6" rel="noopener noreferrer" target="_blank">070000_Stolkin_Striped Cusk-eel_Jackhammer chorus</a><a href="https://fishsounds.net/sound.js?id=2aea4fbf-c1de-41ca-9ce2-d3480849946f" rel="noopener noreferrer" target="_blank">180000_Staaterman_Toadfish_Boop-Grunt-Swoop</a><a href="https://fishsounds.net/sound.js?id=72ca08af-75cf-4e1b-96cd-7b8184d7a863" rel="noopener noreferrer" target="_blank">150000_Casaretto_Haddock_hum</a><a href="https://fishsounds.net/sound.js?id=b59c1a1d-02f0-4b76-9f0d-79ed54301a9a" rel="noopener noreferrer" target="_blank">080000_Amorim_Lusitania Toadfish_Boatwhistle_edited</a><a href="https://fishsounds.net/sound.js?id=302476b3-e7ab-4b1a-afd0-d9bf3a28150f" rel="noopener noreferrer" target="_blank">1970_MP Fish_Seahorse_Click</a><a href="https://fishsounds.net/sound.js?id=214a544d-bad5-4161-b154-408d6f6600c3" rel="noopener noreferrer" target="_blank">170000_RountreeR_Aplodinotus-grunniens_Drum-Call-Chorus</a><a href="https://fishsounds.net/sound.js?id=49441a65-e05c-4051-8f69-3831dcbd0a68" rel="noopener noreferrer" target="_blank">180000_Rowell_Epinephelus striatus_agonistic</a><a href="https://fishsounds.net/sound.js?id=115e3deb-ba6a-49f3-b57f-b2d2aa34e6db" rel="noopener noreferrer" target="_blank">050000_AmorimC_Eutrigla-gurnardus_Growl-Grunt-Knock</a><a href="https://fishsounds.net/sound.js?id=ea307098-c3b2-4100-aaf8-5765bbe9eb7d" rel="noopener noreferrer" target="_blank">180000_AmorimC_Pomatoschistus-pictus_Drum</a>Mentioned in this episode:<a href="https://threshold.captivate.fm/donate">Donate</a>

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