Are my clams dead/dying after spawning?

[Reefski's]

i have had these clams for a couple of years.

do clams have two sexes?

the first one was the Maxima. this went on for a day or so and left the clam all shriveled up which is how it is today. five days after it started. the Maxima's spawn was thicker and more mucusy. i am guessing that is the female.

then the next day for a couple of days the Squamosa spawned leaving the clam like you see.

will they recover or are they dead or dying?

the other three clams in the tank, all Maximas seem fine, expended and all. all other creatures seem fine too.

things that might have influenced the spawn.
i did a 20" water change that day.
the housekeeper used Pinesol on the floor in the rooms by the tank. it was very strong smelling.
i used Lanthanum chloride for PO4 reduction as i have many times in the past.

 

[Reefski's]

the same day the Gorgonian pulled in all polyps which it does periodically.

and two days later was back to normal.

this larger Maxima was not affected at all.

 

[Reefski's]

 

[Sig45]

Giant clams are hemaphrodites( both sexes). Ususally spawn in aquariums when sexually mature and stressed. Abrupt changes in water temp will trigger this phenomenon.

When they spawn the water can foul quickly. water changes and heavy skimming necessary.

Some clams spawn right before they die. This triggers the other mature clams to spawn as well. The squamosa may have been dying already.
You may never know. Next time remove the clams until they are finished about 45' to 1 hr. This will avoid water fouling.

 

[CleveYank]

The photos of the tank tell me that water changes are not being done enough and or not with -0- TDS ro/di water.
And or you overfeed the system.
And the cyano, and hair algae tells me nitrates and phosphates are too high.

IMO, your tank's excess nutrient issues probably poisoned the clam and it cashed it in.

Time to look at your feeding habits, additives, water change frequency, carbon and GFO usage (you need to run some or more than you have) to clean things up.

 

[Reefski's]

i have gotten lax in the water changes. i will soon be doing a big remodel of the tank. emptying it and redoing it. i control PO4 with LaCl and it rarely gets over 0.15, not ideal i know but could that kill the clams. the nitrates are about 25ppm.

i have been holding off on big water changes until i empty the tanks.

the two clams are dead and the other three are fine. why would that be if it is water quality why not all the clams? the larger Maxima that i got as the same time as one of the dead ones is still fine.