jhemdal":s16nfa71 said:
Just curious if anyone really knows - are these genetically or developmentally derived? An example of the first would be bettas, which produce offspring with predictable genetics. An example of the latter would be certain changes made during the growth phase (like adding methyl testosterone to tanks of baby discus) changes the phenotype (the way the fish looks). I had been approached by a clownfish breeder years ago who had planned on exposing developing eggs with high levels of L-thyroxine in the hopes of changing the phenotype of the fish...not that I agree with that of course.
I'm guessing that it is more like it is with koi - the basic genetic mutations are reinforced to the point where they throw "sports" now and again, and then the best looking (or most derived) are retained, and coveted, while the non-sports are sold as regular fish.
Jay
Here is the information I have seen from ORA....
Direct from ORA:
"The Platinum Percula is a nearly all white variation of the True Percula Clownfish. The result of years of selective breeding, the Platinum Percula is derived from our famous Picasso Clownfish. This striking white clownfish develops orange and then black fins as it matures, and retains some orange color in the face.
Not to be confused with the Snowflake Clownfish, which is actually A. ocellaris, the Platinum Percula shows none of the original stripes characteristic of the species. While the middle stripe of the Snowflake is wide and has jagged edges, the Platinum Percula is continuously white from head to tail. No other clownfish, from the wild or from breeders, has ever come close to appearance of the Platinum Percula.
This is the rarest of any clownfish color morph ever developed, and it will be the ultimate prize for any serious clownfish connoisseur. While experimenting with pairing new Picassos, even the breeders at ORA™ were surprised to find this extraordinary result.
As the juveniles began to grow-out we noticed the development of black fins on the rapid growers. At first the dorsal, pectoral, ventral and caudal fins appeared to be clear with some orange color. Then some black pigment appeared on the fins, as true perculas typically do produce more black color as they age. Finally we observed the full black fin color develop, and nothing looked more astonishing than black fins on a white clownfish. These fish will be shipped as juveniles with very little fin color, but expect to observe the full color develop over time."