Tetraodon cutcutia - Emerald puffers used to be very common in the aquarium trade from what I've read (another name is "Common" puffer) but seem to have fallen out of favor due to their aggressiveness. I lucked out with the pair I rescued and managed to get a breeding pair, but even then the male takes frequent runs at the female when he is guarding the eggs. I keep my pair in a 25 gal Hex tank with just a rubber lipped plec as a tankmate. Ph is 7.8 and temp is a constant 79 F. If I was to try with a different pair I think I would go with a 35 gal (3 ft) heavely planted tank. When not guarding the clutch of eggs (which is not too often as the female lays a new clutch each week so far) the male has a tendency to hide in the plants or behind a rock until feeding time, while the female is more active and explores the tank looking for food most of the time.
For some previous posts about my pair try a search for "Chubbs & Skinner".
edit: Although they will eat frozen foods they eat with more zeal when the food is live.
