Sea robins use leg-like fins to taste, navigate seafloor, researchers discover

The latest episode of CBC Radio's Quirks and Quarks had a very excellent segment on this odd creature (amongst other topics). It's a fantastic weekly science show available as a podcast.

https://www.cbc.ca/radio/quirks/sep-28-plastic-we-need-to-un...

Sea robins are the bane of my existence. I just try to make an honest living [0] catching flounder and (hopefully!) stripers and these bums keep eating the bait and making their stupid noises. AT LEAST FIGHT WHEN I HAVE YOU ON THE LINE YOU LAZY FISH

[0] Not really my living don't worry...

This is known since decades so, what adds the new discovery exactly?