It appears thatGramma dejongi, once a very inaccessible reef fish is about to become a lot more common fish in the reef aquarium world. Right after Biota showed their firstcaptive bredG. dejongi, a French Public Aquarium calledMarinelandhas also managed to breed them.
The broodstock Dejongi came from Dejong Marinelife, in the Netherlands as an exchange for some captive bred sandbar sharks,Carcharhinus plumbeus,出生于水族馆。他们于2018年11月与其他一些物种一起来众议院育种计划，包括dottybacks，长诺斯菲鱼，红雀鱼，鸟鸟和各种龙卷种类。
All theses fish were housed in their specially designed broodstock holding system designed and conceived to properly feed the breeders, and harvest the resulting eggs. It took only 10 months to condition these Dejongi broodstock and get them to spawn. The fish are house behind a large window, so they mostly get natural sunlight.
Broodstock tank is 150 liters or around 40 gallons, and equipped with live rock, PVC pipe, Flower pot, and someCaulerpa prolifera。他们被大量喂食，并定期送达Mysis。将鱼放入坦克时长4厘米。
雄性选择了32毫米宽的PVC管，有些管道Caulerpa prolifera还有一些白色过滤介质纤维制成巢。女性参观巢穴，但更喜欢留在锅中。坦克的唯一其他居民是几个Acreichthys tomentosuscaptive bred in the facility and used to regulate aiptasia.
幼虫是在早晨从幼虫收集器中收集的，并转移到了一个800 L的中cosm“活汤”中，里面装满了rotifer，copepods和Isochrysis。Larvae were collected for 8 days and added to the mesocosm. They have daily spawning over a few days period.
Metamorphosis happens after 31 days at 26 C. Tubes and other hiding objects must be added to the system as soon as these fish settle. At 39 days all the fish settled, and were collected at 44 days. The survival rate was 50%.
Within a year most species targeted by this program were successfully bred. They are working on other fish, and are collecting a lot of eggs from their display. Most of these fish will enter the exchange program between public aquariums, and there are little chance to see them in a hobbyist tank but luckily Biota is filling that gap.
The young and successful Marineland breeding team is composed of several aquarist including Jérome Gillet (Which is also the photographer), Sarah Mension, Régis Billion, and a new recruit Laetitia Cluzel under supervision of Jean Philippe Catteau. Good Job Guys! A special thanks to Alain Duday for its great advices, and Cfeed for their great help with Copepodes.
