Pseudochromis porphyreus The purple pseudochromis is also known as the magenta dottyback. It makes a stunning and active addition to your reef or community tank. A 30 gallon or larger aquarium should be provided. It may become aggressive towards other Pseudochromis or fish with similar body shapes. It is easy to keep in an aquarium when provided with numerous hiding places. Feed a variety of vitamin enriched foods to help maintain it's bright color.