rock-hopper trawl

rock-hopper trawl
a demersal otter trawl with rubber disks attached to the groundrope and to a second rope off-centre. When the trawl encounters an obstruction on the sea bed, the groundrope and the second rope wind around each other and accumulate tension, eventually when the tension is too high the trawl hops free

Dictionary of ichthyology. 2009.

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