Distribution: Coris Julis are distributed in the oceans of the Eastern Atlantic, from Sweden to south of Cape Lopez, Gabon, and have also been seen in the Mediterranean Sea.
PH: 8.1 – 8.4
Temperature: Approx 22°C (72 F)
Salinity: 1.020 – 1.025
Description: Mediterranean Rainbowfish, or Rainbow Wrasse as they are commonly called, grow up to a huge 30cm in length. Both sexes have an elongated body of a variety of red, black, white and orange colouration, with females being typically smaller and less flamboyant. Males display a zigzag orange to red stripe along the side of the body whereas females display a dark brown stripe. Fins typically have variable light colouration with an orange/red or black spot.
Diet: As with all wrasses, the Rainbow Wrasse is carnivorous and will take frozen and live offerings. Provide such tasty treats as fireworms, clams, mysid shrimp, squid, flaked foods, tubeworms, flatworms, scallop clam and other small crustacean.
Breeding: Like other wrasse, Coris Julis can change sex during their life to maintain the balance of dominance in a harem, which consists of a dominant male and multiple females in their natural marine environment. The females release their eggs into the water and the ocean currents take them away. As such, they are notoriously difficult to breed in captivity.
Comments: The Rainbow Wrasse has been known to be semi-aggressive and is recommended for moderate to expert aquarists. Decorate your marine aquarium with rockwork, a fine, thick layered sandy base and caves in which to hide. Allow for both high light levels and shaded areas. It can frighten easily so provide a lot of hiding places and a deep sand bed so that it can retreat when needed. You will need a large tank to hold this species as it loves deep water and plenty of room in which to swim.
Remember that this species may not be reef safe, so exercise necessary caution.
Tip: If you have just bought a Rainbow Wrasse and it has disappeared, it is probably just hiding or sleeping in the sandy base. Don’t worry; it will reappear when it has acclimatised itself.
Recommended Compatible Species:
Rainbow Wrasse can be cantankerous so you will need to bear this in mind when choosing tankmates. In the wild, it has been found alone and in small groups, so more than one individual is only necessary to bring out colouration and activity.
Depending on the size and temperament of your wrasse, potential tankmates could include the hogfish, parrotfish, pseudochromis, squirrelfish, puffers, tangs and surgeons, and live corals.
Originally posted 2010-03-15 20:35:48. Republished by Blog Post Promoter