Is my derasa bleaching?

[campaign000]

I got this baby 10 months ago, who has been growing well (from 2.5" to 4.5")
Two months ago I put it under 250w HM from T5s and PAR doubled. Lately I found it became whiter and some blurry gray stripes appeared between original white stripes. So I'm worried it's bleaching.
Parameters of water is good and nothing changed but lighting.
10 months earlier

Now

 

[campaign000]

 

[jda]

It is not bleaching. That happens much faster and almost immediately after a change is made. Clams do not really bleach, but they can/do digest zoox since they have a stomach and gastro tract. When a clam does expel or digest all of the zoox, the blue would be gone too.

That is the new color in response to the new light. Zoox can become more sparse or dense depending on need, but more light might mean that less zoox is necessary.

Growth is good. If you are growing, then your clam is healthy. I would not sweat this.

 

[DSC reef]

Definitely not bleaching. Here is some good info regarding bleaching in clams as they can do so.

https://www.gibellaquarium.us/stony-corals/chapter-fourthe-biology-of-tridacnid-clams.html

 

[jda]

Here is a maxima that expelled or digested the zoox that were not functioning (blocked from light). You can see that the whole area is lighter, not just a color or two.

https://www.reef2reef.com/threads/maxima-light-damage.369899/

 

[campaign000]

It is not bleaching. That happens much faster and almost immediately after a change is made. Clams do not really bleach, but they can/do digest zoox since they have a stomach and gastro tract. When a clam does expel or digest all of the zoox, the blue would be gone too.

That is the new color in response to the new light. Zoox can become more sparse or dense depending on need, but more light might mean that less zoox is necessary.

Growth is good. If you are growing, then your clam is healthy. I would not sweat this.

Clams are really tricky considering different clade of zoox in different clam even for the same species. Another derasa gets stronger light and the color is great no sign of expeling zoox. I know low light could make clams become lighter and lighter, but the same thing happened under MH is the first time for me.

 

[campaign000]

Definitely not bleaching. Here is some good info regarding bleaching in clams as they can do so.

https://www.gibellaquarium.us/stony-corals/chapter-fourthe-biology-of-tridacnid-clams.html

Thanks man really long article I'll go through it later.

 

[DSC reef]

Thanks man really long article I'll go through it later.

Your very welcome. You'll find some interesting stuff in there.

 

[jda]

I love the teardrop, BTW. Where did you get that? I have not seen any in the US for a long time.

 

[campaign000]

I love the teardrop, BTW. Where did you get that? I have not seen any in the US for a long time.

I'm living in China and lfs often have noae in store including red, green and even white one.

 

[DSC reef]

I'm living in China and lfs often have noae in store including red, green and even white one.

Wow!;Drool;Drool we always wanted a tridacna noae.

 

[jda]

Amazing. If they are cheap, then don't even tell me... I probably cannot handle it.

I had a gold and blue T. Noae (they were just T. Maxima back then) that I got rid of when it got to about 10 inches. Regretted it for a decade.

 

[campaign000]

Amazing. If they are cheap, then don't even tell me... I probably cannot handle it.

I had a gold and blue T. Noae (they were just T. Maxima back then) that I got rid of when it got to about 10 inches. Regretted it for a decade.

I wanna tell you the price, but you're gonna have a heart attack.

 

[jda]

You can say and I just can be jealous. What comes around, goes around, right? People outside of the US complain all the time about how cheap we have certain stuff. :)

 

[DeniseAndy]

My goodness what amazing clams. Must be hard not to have a huge tank full of them.

 

[jda]

I had a pair of small, clear symbiotic shrimp live inside of my T. Noae. You could see them near the mouth, but they never appeared to leave.

 

[campaign000]

I had a pair of small, clear symbiotic shrimp live inside of my T. Noae. You could see them near the mouth, but they never appeared to leave.

Lots of my clams have symbiotic shrimps and I once saw one hanging out of the mouth in the night, but went back into the clam when light on it.

 

[hotashes]

I had a pair of small, clear symbiotic shrimp live inside of my T. Noae. You could see them near the mouth, but they never appeared to leave.

On that note, would any form of pods eat a clam? Only my maxima has some hanging around its base..

A.

 

[jda]

That is a sure-fire way to tell that they are wild collected. I have never seen a shrimp in a farmed clam... no idea if the shrimp are just not in their systems, or of the clams are yet still too small... probably both.

 

[campaign000]

You can say and I just can be jealous. What comes around, goes around, right? People outside of the US complain all the time about how cheap we have certain stuff. :)

Price doesn't matter. The real problem is that beautiful clams have been becoming less and less. I regret I didn't collect them all when they are available.