⁴ᴷ ᵁˡᵗʳᵃ ᴴᴰ 𝐁𝐫𝐞𝐞𝐝𝐢𝐧𝐠 𝐩𝐫𝐨𝐣𝐞𝐜𝐭: 𝐂𝐫𝐨𝐚𝐜𝐤𝐢𝐧𝐠 𝐆𝐨𝐮𝐫𝐚𝐦𝐢 (Trichopsis vittata)

𝐂𝐫𝐨𝐚𝐜𝐤𝐢𝐧𝐠 𝐆𝐨𝐮𝐫𝐚𝐦𝐢, this name is derived from the ability of genus members to produce audible sounds with a specialised pectoral mechanism. This structure comprises modified pectoral-fin tendons and muscles which are stretched and plucked by the basal portion of the anterior fin rays in a similar way to guitar strings.

Studies suggest that Trichopsis species are able to settle conflicts without damaging each other physically by assessing factors such as body weight and length, which are transmitted by both visual and acoustic ‘croaking’ signals. During courtship the female produces ‘purring’ sounds in order to initiate spawning, and they are the only fishes in which this is known to occur.

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