The Orange-Line Cardina (Ostorhinchus properuptus) l is a slower swimmer, and extremely peaceful in nature. They should be housed with other fish of similar size and temperament. They can grow to be about 3" fully mature and should be kept in a tank with plenty of live rock or plants to offer hiding places during the day. The Orange-Line Cardinal has a nocturnal living habit and will be most active during the night.

They do best in schools, as they are a social fish. Groups of 3 - 5 are recommended for tanks up to 25 gallons, while larger numbers may be achieved in larger aquariums. They are an excellent choice for beginner aquarists as they are active, friendly, easy to care for, and easily adapt to captive feeding.

Orange-Line Cardinals are carnivorous and should be fed a diet of vitamin enriched Brine or Mysis shrimp, along with other finely chopped meaty preparations. They will also eat Copepods if present in the tank, and fully mature adults may pick at smaller benthic inverts. If you are finding the Cardinalfish is having difficulties eating, it can be best to offer food at night. They will thrive in a temperature range of 75-80F and a pH of 8.1-8.4.