Dichotomyctere

The green puffer, Dichotomyctere fluviatilis, is a widespread puffer from South and Southeast Asia, found in slow-moving rivers and estuaries. It is often confused with D. nigroviridis and Tetraodon schoutedeni but has a more slender, streamlined shape. Though often sold in freshwater, it is a true brackish species and needs a specific gravity of around 1.005 to 1.010 to survive long term. It is still often sold as Tetraodon fluviatilis.

The green spotted puffer, Dichotomyctere nigroviridis, is a widespread puffer from South and Southeast Asia, found in both brackish and fresh water. It is often confused with D. fluviatilis and Tetraodon schoutedeni. Although often sold as a community fish, it nips slow-moving or long-finned tankmates and some individuals become spiteful with age. It is still often sold as Tetraodon nigroviridis.

The figure eight puffer, Dichotomyctere ocellatus, is a small puffer from Cambodia, Malaysia and Indonesia. It lives in rivers and coastal waters, most often in freshwater but frequently in brackish conditions. Very sensitive to deteriorating water quality, it tends to live longer with a little marine salt added. It nips the fins of slow-moving or long-finned fish, and single specimens usually live longer in captivity than groups. It is still often sold as Tetraodon biocellatus.