Check out these Deresas..

acroporas

New member
Since I so much love posting pictures of clams you guys cant have I just had to post these two wild deresas.

First
Blue-Deresa-2.jpg


and then (sory for the poor image quality on this one - was taken with a Sony P&S)

Blue-Deresa-1.jpg
 
Acroporas,
I wont say it's common, but I'd also not say it's rare to see blue and also green derasas in such colors when they are fully grown.
Look at pics of Pacific farms brood stock and you'll see those amazing derasas.
 
Great pics Acroporas!

A few years ago, a major LFS out here had a beautiful 7-8" blue derasa (with amazing mantle extension). I owner offerred the clam to me for somewhere in the ballpark of around 200 measly bucks. I'm not sure what I was thinking when I passed it up several times.

Unfortunately, eventually, the clam ended up being a victim to the dreaded "clam disease" that was going on a couple years back. And yes, I'm still kicking myself for not picking it up earlier.
 
Vili_Shark said:
Acroporas,
I wont say it's common, but I'd also not say it's rare to see blue and also green derasas in such colors when they are fully grown.
Look at pics of Pacific farms brood stock and you'll see those amazing derasas.

I'd say it's common here on the GBR. More than half of the deresas I have seen in the wild have been blue. But I have yet to see one in the US nor have I seen anyone here claiming to have one so I'd say it is fair to say that they are "clams you guys cant have".
 
Project Reef said:
Great pics Acroporas!

Thanks

A few years ago, a major LFS out here had a beautiful 7-8" blue derasa (with amazing mantle extension). I owner offerred the clam to me for somewhere in the ballpark of around 200 measly bucks. I'm not sure what I was thinking when I passed it up several times.

Unfortunately, eventually, the clam ended up being a victim to the dreaded "clam disease" that was going on a couple years back. And yes, I'm still kicking myself for not picking it up earlier.


I'll join in the kicking if you need two more feet.
 
Acroporas,
That's cause people dont have 2 feet clams.
I can say for sure that some of the parents of the Tonga derasas that are in the market (and that's a nice share of the market), are blue or blue green.
Their offspring which are sold to us as the Blue rimmed squamosas, are not blue.
 
Vili_Shark said:
Acroporas,
That's cause people dont have 2 feet clams.
I can say for sure that some of the parents of the Tonga derasas that are in the market (and that's a nice share of the market), are blue or blue green.
Their offspring which are sold to us as the Blue rimmed squamosas, are not blue.

You can say for sure that offspring of tonga deresas who's parents were blue are sold to us as squamosa's? Your saying that F2 blue deresas are routinly sold as squamosas? Well if that is really the case I dont know if I need bother discussing the issue with you any further.

Ok, I do know what you ment to say, I'm just giving you a hard time.

You suggesting that many of the small brown deresas would grow up to be blue if given the chance? I guess it could be - you are right about not many people having 2 feet deresas. And I have seen many more green deresas in the 8+ inch range than I have seen in the 4 inch range.

But I have not ever experienced nor can I recall reading any literature claiming clams changing colour from brown to blue as they age. I also have not read anything claiming a strong link between the colour of the offspring to the parents in tridacnids. I'm not saying your wrong, It is not in my personality to take anything someone tells me as fact without some investigation, so can you point me to some literature supporting these claims.


And next time I am out on the reef, I am going to have an eye out for small blue deresas. Actually I havent noticed any small deresas.
 
Acroporas,
Good you figured out that I meant derasas.
That's what's happening when I write a post from the office.
Anyway, I'm not trying to suggest anything, nor I have literature to support what said.
It just happened to be that the brood stock of the cultured Tonga derasa are greenish to blue, it also a fact that they are HUGE.
Their offspring sold in the states are not blue or green, just blue rimmed, I doubt they will ever turn greenish or bluish or whatever.
from here you can try to figure out whatever.
 
Vili, I know a person who has a station out in Tonga and I remember him saying something to the effect that 1 out of every 10-15 derasas have the nice blue sheen.
 
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