IME tigs and pbass are good tank mates but of course it doesn't mean your pair would be fine together. YMMV as they say.
Maybe the tig is still trying to figure out if the pbass can be eaten. Once he knows, he will leave it alone. Normally, there shouldn't be any other reason for a tig to attack a pbass.
I don't see any significant damage on the tig apart from minor abrasions. If you can easily, you may remove the pbass... or add more tankmates, unless that sponge filter is all you got for filtration.
Maybe the tig is still trying to figure out if the pbass can be eaten. Once he knows, he will leave it alone. Normally, there shouldn't be any other reason for a tig to attack a pbass.
I don't see any significant damage on the tig apart from minor abrasions. If you can easily, you may remove the pbass... or add more tankmates, unless that sponge filter is all you got for filtration.