Kessil

Anyone breeding Berghia?

The_Lazy_Reefer

BOD
Staff member
Well I just watched a Berghia fight for it’s life against a brittle star......a good 5 min struggle and the brittle eventually let it go but man I’m thinking with all my critters does that matter to survival.
 

Dan-sf

Guest
Check reefcentral, SFDan is breeding and selling them
Certainly not even close to demand though! I think I got PMs from like 15 people who wanted them and I'll have enough for the first 2.

The timeline for me has been as follows:

Jan 8 - Got delivery of 10 1/4" nudis, 7 alive
Jan 15-30 - Nudis started to breed and lay eggs (and once the nudis reach full size, they are laying giant egg spirals ever day)
Feb 15 - Baby nudis start to be seen
Mar 5 - Some nudis grow to small salable size (between 1/4" - 1/2")

It is hard to get an exact count but I think I've got roughly 15 salable nudis right now, and maybe another 10 smaller than that roaming around. I'm going to sell the first 15 and then keep evaluating the situation.

It seems to be the balancing act is as follows:
- Larger nudis eat aiptasias much faster than smaller ones, but they also lay much bigger (and probably more fertile) egg spirals
- Growing a nudi from tiny to 1/4" requires a lot less aiptasia than going from 1/4" to 1/2"
- It takes a little under 2 months to go from egg spiral to salable nudi

So I think the keys are to have a good population of large nudis, but not too many as they'll eat all your aiptasias. Then making sure to sell the salable ones quickly as you don't want them eating all your aiptasias. Also really making sure nothing is eating your nudi eggs (something I'm going to have to deal with for generation 2 -- some amphipods got into my breeding tank!).

I'll keep the tank going and hopefully I can double or triple the size of the next generation just by keeping more large nudis around for a longer period of time so they can lay more eggs. Hopefully my aiptasia supply will hold up. It certainly isn't worth the effort given the amount of money I'm getting back but its a fun little operation for now.
 
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JVU

BOD
Staff member
Update-

My Aiptasia tank is doing ok, the little buggers look happy enough. They are slowly growing and increasing numbers, but they aren’t reproducing as much as I’d like. The ones in my display tank are multiplying faster, I guess that’s not surprising since I have conditions optimized better there.

I did try cutting half of them in half a couple weeks ago, and besides those looking unhappy for a while, it didn’t seem to make much difference in the number of individuals.

I haven’t been feeding very much, small amount couple times a week, I could try more but I’ve been busy.

I think I’ll be ready to buy some Berghia soon to breed in a separate smaller tank that I feed with rocks/tiles from this tank, then move into my display.

It’s not pretty, but successful so far:

4BBA8129-7C47-4CA4-BEFA-751BCA1671F9.jpeg
 

Dan-sf

Guest
If you are only looking for a few Nudi's (<5) let me know. I can save you the shipping costs.

As an update on my experiment, I ended up selling 25 nudis, put 5 more into my DT and still have at least 10 in there. I underestimated the number of nudis I ended up growing. Interestingly I haven't gotten this generation of nudis to lay any more eggs, even though I've got at least a couple of pretty large well fed nudis. I'm not sure if that is because the amphipods are eating all the eggs or some other reason, but it looks like I'm going to have to setup another tank and try to re-create what worked the first time.
 
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JVU

BOD
Staff member
If you are only looking for a few Nudi's (<5) let me know. I can save you the shipping costs.

As an update on my experiment, I ended up selling 25 nudis, put 5 more into my DT and still have at least 10 in there. I underestimated the number of nudis I ended up growing. Interestingly I haven't gotten this generation of nudis to lay any more eggs, even though I've got at least a couple of pretty large well fed nudis. I'm not sure if that is because the amphipods are eating all the eggs or some other reason, but it looks like I'm going to have to setup another tank and try to re-create what worked the first time.
Yes, I’d be interested, though not quite ready for them. We can PM.
 

JVU

BOD
Staff member
Howdy, Anybody have a majano wand they can rent me?


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I have one. In my experience (which is limited because I stopped using it) they don’t kill aiptasia. They can help to temporarily reduce the size of an aiptasia if that’s of value.
 

The_Lazy_Reefer

BOD
Staff member
Hey I got a whole bunch of Aiptasia rock if anyone wants it. Pickup in Oakland as I’m the frag tank will be shut down tomorrow. Just occurred to me maybe someone wants them.
 

Dan-sf

Guest
If you are only looking for a few Nudi's (<5) let me know. I can save you the shipping costs.

As an update on my experiment, I ended up selling 25 nudis, put 5 more into my DT and still have at least 10 in there. I underestimated the number of nudis I ended up growing. Interestingly I haven't gotten this generation of nudis to lay any more eggs, even though I've got at least a couple of pretty large well fed nudis. I'm not sure if that is because the amphipods are eating all the eggs or some other reason, but it looks like I'm going to have to setup another tank and try to re-create what worked the first time.
As an update to my prior update, I once again underestimated how many nudibranchs I had. I sold another 10 (before the shelter in place), put another 5 into my DT and still have at least 15 in there. They are rapidly eating all my aiptasias and I'd sell them in a heartbeat, but as a good citizen I'm not violated the shelter in place rules (dont PM me -- I'm a rule follower). So I think I'm just going to end up moving most of them to my DT and let them go to town on the aiptasias which started me on this quest in the first place.

I've now set up another tank that is amphipod free and put some nudibranchs in there, who have dutifully started laying eggs. The nudibranchs in my current nudi tank (with amphipods) are laying eggs all over the place. So this will be a good test as to whether amphipods actually are a problem. Thus far I don't see any evidence of the amphipods eating the eggs, but we'll see what happens.

I'm quickly running out of harvestable aiptasia so I don't know how many more generations I'll be able to sustain this operation, but it was fun while it lasted.
 
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