Today we are at day 33 of the Apolemichthys arcuatus larval run and what a challenge the last three weeks have been. There have been several setbacks and I'm now down to just a handful of larvae. I think the underlying problem has been the record high temps and humidity we've been having which have turned the garage into a sauna. The higher temps probably had some direct effect on the larvae but I think that most of the losses are due to a bacterial problem with the bacteria benefiting from the higher temperatures.
I am pleased to have gotten past the barrier of day 22 that teased me 2 years ago when I was working with this species but I feel that I have more questions than answers after going through these last three weeks. I am considering keeping this larval run going and starting a new run but I know from experience how taxing that can be on food cultures, water, time and my energy level. Having said that, I'll be checking for eggs tonight and if I get a good spawn I know I won't be able to resist them.
Here is a photo showing the results of the last setback which occured at day 30 . You can see that the larger larvae have the darkened dorsal area which develops prior to settling out. Those larger larvae are about a cm in length. (Their tails are clear and difficult to see in the photo but are included in the total length measurement).