The brotherly bond between Shaun (74*) and Mitch (51*) proved unbreakable, the pair posting a 112-run partnership to lead WA to 2-148 at stumps, ahead of Tasmania by 88 runs.

It was a strong response to Tasmania who were all out for 397 with a 60-run lead inspired by Tim Paine's century.

Earlier, Jhye Richardson was the pick of the WA bowlers, taking 3-58, while Mitchell Marsh claimed 2-60 and Cameron Green 2-72.

The brothers resume their partnership tomorrow morning at 9.30am.