Wow Breezy, small world.
No, the ling were not bergals, also called cunners.
And not sea robins. Although the sea robins look a lot more like the 'ling' in the picture, the 'ling' we used to catch looked nothing so sinister.
Caught them from party boats or off the piers, and they were just fish we considered not worthy of taking home.
Do not know what they were and have Googled and searched a bit, but to no avail.
One of the problems with fish is that the common names vary with locality.
Here striped bass = rockfish, something I have become very used to.
Do not know what a 'ling' is, or was. And probably never will.
So it goes.
Take care.