Trouble catching a certain special fish

So I know the Glacierfish is the second hardest legendary fish to get, but I got the Legend kind of easily somehow. Does anyone have any tips on catching this legendary fish? I’ve been trying to catch it for two game years and every time it comes up to catch it, I always lose it. I use regular pink bait and the trap bobber. I’ve caught every other legendary fish, I just can’t seem to get the Glacierfish. Thanks so much for any help.