pregnant blueband goby!

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Hello all. So...I got a pair of blue band sleeper gobies from my lfs today and the female is heavily pregnant. I have got all sorts of fish in my mixed reef. Clownfish, tangs, wrasses, mandarins, cardinals. Is there anything I can do to save the babies? My lfs said it is almost impossible in a mixed reef with rock with so many fish that could and will eat them...Any ideas?
 
Hello all. So...I got a pair of blue band sleeper gobies from my lfs today and the female is heavily pregnant. I have got all sorts of fish in my mixed reef. Clownfish, tangs, wrasses, mandarins, cardinals. Is there anything I can do to save the babies? My lfs said it is almost impossible in a mixed reef with rock with so many fish that could and will eat them...Any ideas?
#reefsquad
 
They are demersal spawners. The eggs will be deposited in a nest guarded by the male. Hatch time is ~3 days for that species after eggs are deposited. You can either try removing the pair now and putting them in a separate tank with some PVC or small rock cave structures for them to nest in, or leave them in the tank and get/make a larval fish trap to attempt to collect the larval fish when they hatch (look up a vossen larval trap).

Once you have the larvae collected with either method, separate from the adults into a small tank. Make sure there is no filtration that will suck up or damage the larvae (e.g. no hang-on-back filters, and keep airstone bubbles fine and not too turbulent).

You'll need small live foods for the larvae. Likely S or L-type rotifers fed often (every 3-4 hours or so). Eventually, you'll need to graduate to brine shrimp nauplii so make sure to have the ability to hatch those as well.
 
If you're looking to rear the young, then, as mentioned, you'll need to put them in their own tank.

The first thread linked at the bottom - while about a different species - has more info throughout it than just what I've listed in my "general advice" below (though that advice is in the other thread too), and that advice may help as well; the main reason I've listed it here, though, is that it gives some good insight into the rearing and rearing troubleshooting of a difficult species (which these guys, Valencienna strigata, almost certainly are).

The second thread is all of the info that I've really been able to find on Valencienna spp. specifically, so I'd strongly recommend reading through it (spoilers, they made it to day 10 post hatch using Parvocalanus crassirostris nauplii - then hit a bottleneck and lost all the larvae; the larvae probably need a different kind of food starting around day 9 or 10).
Based on the fact that I can't find records of any of the species in this genus being reared successfully despite multiple attempts at raising them, they're likely going to be very difficult and have very specific feeding needs (so don't feel bad if you don't succeed, especially on your first attempt).

All of that said, the advice collected below may help with trying to actually rear the young (it's copied and pasted from another of my posts, so it's not super organized - sorry) if you decide to try.

"Some general advice that might help:
- Have a tank ready to move the larvae into (basically a tank with an air stone, a dim light, and a heater - a kreisel tank is ideal, but not necessary; you don't want a filter, a skimmer, uncovered pumps/powerheads, etc. - it needs to be as pelagic larvae safe as possible).
- Be prepared to catch the young when they hatch (ideally, you'd be able to move the eggs immediately before hatching into the new tank, but I'm assuming you don't know exactly when they'll hatch) - catch them and move them into the larval rearing tank as soon as possible.
ISpeakForTheSeas said:
Assuming you have fertile eggs, the advice I would give is this:
- if possible, get some Parvocalanus crassirostris pods too (rotifers are great, and I would expect the larvae to go for them, but some fish larvae are picky and prefer pods over rotifers - having both seems like a good way to ensure you have good, small foods for them... Artemia and other larger pod species would likely be good to have on hand too for the larvae as they grow.

- Get various sizes of very fine sieves so you can control the size of the feeders being offered to the larvae as/if needed.

- Add phyto directly to the larval rearing tank. It’s a good method of ensuring that the feeders are gut-loaded and healthy, and it makes them easier for the fish to see (better feeding/survival rates are typically observed with this method).
- Observe and note information about the larvae (things like how big the eggs are, how big the larvae are, when the larvae settle, when coloration comes in, etc.) and the larval behaviors (stuff like if they are attracted to light, how they react to light, if they are attracted to certain colors, what feeders they eat and what what sizes of feeders they eat at what days post hatch, what kind of substrate they prefer to settle on, are they cannibalistic, etc.).

- Watch for developmental bottlenecks and issues with your rearing methods.

- A lot of people run into feeder issues their first few times breeding, so I’d have a backup plan in place to be able to get some feeders quickly if you find yourself needing some.
With regards to the sieves and feeder sizes:
- You may need to screen the feed initially to only offer Parvocalanus nauplii.
- Observing the larvae eating when/if possible is important for telling if they are accepting/able to eat the food you are offering them.
ISpeakForTheSeas said:
Generally the main thing to watch for at this stage is a bottleneck where the young start dying off - these usually happen after a few days (day three post hatch seems to be one of the most common bottleneck days for fish that hatch with a yolk they can feed off of - if the rots and phyto don’t provide the proper nutrition for these guys, you might see a die off sometime around here). Some fish run into multiple bottlenecks, including some that happen around/after 2-3 weeks post hatch, so you really need to keep an eye on how things are going. Bottlenecks typically occur because the food the fry is eating isn’t nutritious enough for them, or they’re not interested in eating the food offered, or the food isn’t the proper size for them to eat.
ISpeakForTheSeas said:
if you do run into a bottleneck and lose this batch, don’t get too disappointed by it - this happens frequently in trying to breed a new species (even to the professionals), and every attempt gets one step closer to success.
With regards to the substrate settlement:
- Some species need sand, rock, dark areas, specific colors, or other oddly specific things to settle on/in (from what I've seen, inverts are usually a lot more picky with this), so it may help to have a ledge or cave (PVC should be fine for this, if it's even needed, which I honestly kind of doubt) and a little sand in the larval rearing tank.


That’s all I can think of at the moment - hope it helps!"
 
If you're looking to rear the young, then, as mentioned, you'll need to put them in their own tank.

The first thread linked at the bottom - while about a different species - has more info throughout it than just what I've listed in my "general advice" below (though that advice is in the other thread too), and that advice may help as well; the main reason I've listed it here, though, is that it gives some good insight into the rearing and rearing troubleshooting of a difficult species (which these guys, Valencienna strigata, almost certainly are).

The second thread is all of the info that I've really been able to find on Valencienna spp. specifically, so I'd strongly recommend reading through it (spoilers, they made it to day 10 post hatch using Parvocalanus crassirostris nauplii - then hit a bottleneck and lost all the larvae; the larvae probably need a different kind of food starting around day 9 or 10).
Based on the fact that I can't find records of any of the species in this genus being reared successfully despite multiple attempts at raising them, they're likely going to be very difficult and have very specific feeding needs (so don't feel bad if you don't succeed, especially on your first attempt).

All of that said, the advice collected below may help with trying to actually rear the young (it's copied and pasted from another of my posts, so it's not super organized - sorry) if you decide to try.

"Some general advice that might help:
- Have a tank ready to move the larvae into (basically a tank with an air stone, a dim light, and a heater - a kreisel tank is ideal, but not necessary; you don't want a filter, a skimmer, uncovered pumps/powerheads, etc. - it needs to be as pelagic larvae safe as possible).
- Be prepared to catch the young when they hatch (ideally, you'd be able to move the eggs immediately before hatching into the new tank, but I'm assuming you don't know exactly when they'll hatch) - catch them and move them into the larval rearing tank as soon as possible.

With regards to the sieves and feeder sizes:
- You may need to screen the feed initially to only offer Parvocalanus nauplii.
- Observing the larvae eating when/if possible is important for telling if they are accepting/able to eat the food you are offering them.


With regards to the substrate settlement:
- Some species need sand, rock, dark areas, specific colors, or other oddly specific things to settle on/in (from what I've seen, inverts are usually a lot more picky with this), so it may help to have a ledge or cave (PVC should be fine for this, if it's even needed, which I honestly kind of doubt) and a little sand in the larval rearing tank.


That’s all I can think of at the moment - hope it helps!"
Thank you very much for this extremely detailed input! I understand this is a very difficult task, especially for this fish species, given the fact that it is my first time dealing with pregnant fish. The female is sitting in a cave under a rock all day, barely moving and eating. The male is very active. Is this normal for a female ready to give birth or is there something wrong with her?
 
The female is sitting in a cave under a rock all day, barely moving and eating. The male is very active. Is this normal for a female ready to give birth or is there something wrong with her?
I'd probably be concerned there's something wrong with her if you're confident that it's the female. As mentioned, the male should stay in the burrow to guard the eggs, and he won't eat as much during the process, but the female should be out and about eating relatively heavily:

"Pairs stayed within close proximity to each other and their burrows. Females fed at a higher rate than their mates, while males spent more time maintaining burrows. Females spawned every 13 days; males guarded eggs in the burrow for 2–3 days."

Are you sure the female is 1 ) female, and 2 ) gravid (pregnant)? The following quote should help with the first question at least:

"Additionally, females formed a crescent of dark pigments on their abdomen that resembled a gravid condition;"

*Both quotes were pulled from this link:
 
I'd probably be concerned there's something wrong with her if you're confident that it's the female. As mentioned, the male should stay in the burrow to guard the eggs, and he won't eat as much during the process, but the female should be out and about eating relatively heavily:

"Pairs stayed within close proximity to each other and their burrows. Females fed at a higher rate than their mates, while males spent more time maintaining burrows. Females spawned every 13 days; males guarded eggs in the burrow for 2–3 days."

Are you sure the female is 1 ) female, and 2 ) gravid (pregnant)? The following quote should help with the first question at least:

"Additionally, females formed a crescent of dark pigments on their abdomen that resembled a gravid condition;"

*Both quotes were pulled from this link:
Hi, yes I am sure she is the female. She is full with eggs, at least she was until last night when I last saw her. She was lying quite still in her cave, while the male was swimming happily about
 
Hi, yes I am sure she is the female. She is full with eggs, at least she was until last night when I last saw her. She was lying quite still in her cave, while the male was swimming happily about
Alright - I ask because sometimes fish can look pregnant when they're really suffering from conditions like bloat.
 
Hi, yes I am sure she is the female. She is full with eggs, at least she was until last night when I last saw her. She was lying quite still in her cave, while the male was swimming happily about
Typically a gravid female only really shows 48 hours before spawning and look like they swolled a marble 24 hours pre spawn. She should be very active not lying still in a cave. I think there is something wrong since she has been this way for a week.
 
Hello all. So...I got a pair of blue band sleeper gobies from my lfs today and the female is heavily pregnant. I have got all sorts of fish in my mixed reef. Clownfish, tangs, wrasses, mandarins, cardinals. Is there anything I can do to save the babies? My lfs said it is almost impossible in a mixed reef with rock with so many fish that could and will eat them...Any ideas?
Can you get a photo of the specimen?
Also I wouldn’t have hope of saving the young. The adults don’t do well in captivity let alone the young. You’ll really struggle to get the young the food required and that’s even if you get them out of the tank alive. Here’s an article I wrote earlier this Year about why it’s so difficult to keep the adults. Then think about trying to mush that down to the young and it’ll be much more complex than rearing Clownfish and damsels/chromis.
https://www.reef2reef.com/ams/valenciennea-and-the-sandsifting-gobies-an-in-depth-look.913/
 
Hello, thank you all for your answers. I have been keeping valenciennea sexgutata fairly successfully for some years and after my last one died, I got a pair of valenciennea strigata a week ago. The female was obviously pregnant and while the male got instantly used to his new surroundings and is swimming about and sifting sand hapilly, the female hid under a rock upon arrival, barely eating and I haven't seen her in the last two days. The tank is 120 gallons with quite a bit of rockwork, so I am afraid she might have died. Maybe there was something wrong with her or the pregnancy and simultaneous shipping was too much for her?
 

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