Murky vs Probius
Laning against Probious is like laning against Gazlowe. The main priority is Probius's towers and cannons. If probius lays his towers/cannons close together you can target them with a single pufferfish. All the while you have to dodge probius explosive rifts that are like land mines. You can bubble through these rifts to get to Probius. Probius does have a very small health pool so if you can reach him Murky can do some damage and force him to retreat.
Fish Tank does not help with Probius as his towers/cannons deal ability damage. Slippery When Wet will let Murky zip through his defenses to get to Probius.