Always with Dwarf Puffers. Petsmart is really clever on the breeding side, but they're corporate point of sales standards are, shall we say, sub-optimal. I mean, their Violet Gobies are always in fresh water. They pack all their female bettas and all of their Dwarf Gouramis into the same 20 gallon cube with like 6" of fish per gallon. Until recently, their male bettas were in half pint cups of methylene blue solution. They sell Pangius Catfish, Red Bellied Pacu, and Silver Tip Sharks, and they only get the adult length right on the Pacus (in tiny print), and, just to make it interesting, they say that the DPs and Bushfish require aquarium salt.
Really burns my biscuits, but at the same time gives me a nice smug feeling of superiority.
Man those little devils can move! I watched them for a day while they acclimated, and they just hung there in the water perfecting their leaf mimicry, but now that they're feeling at home, they zip around pretty good. They use their pectoral fins, which are nearly invisible, and they can move forward or backward with nearly equal facility. I've also noticed that they burp. I guess they use up the air in their labyrinth organ and then belch CO2.
Very cool fish, and much, much prettier than I expected.