Breeding Journal, Species: Gobiodon okinawae (Yellow Coral Goby)

General
Species:  Gobiodon okinawae
Social Structure:  M/F Pair
Size of Individuals:  M: 26mm, F: 23mm
Age of Individuals:  Unkown,  purchased: Oct. 2009
Date added to Tank: 10/05/10 current tank 

Broodstock Tank Details
Size of Tank:  80L
Substrate Details:  Bare
Filtration Details:  Part of main broodstock system
Water Changes:  20% weekly
Water Temperature:  26.0C
Lighting:  2 X T5
Lighting Cycle:  12/12 average
Other Tank Inhabitants:  Blackcap, yellow watchman goby, snails.

Broodstock Feeding Details
Food Types:  Frozen DIY
Feeding Schedule:  2 x day (5 days) 1 x day (2 days)

Spawning Details
Date of First Spawn:  Feb 2010 
Spawn Time of Day:  Near dark

Dates of Consecutive Spawns: 11/13/2010, 11/12/2010, 12/2/2010, 12/8/2010, 12/16/2010, 2/2/2011, 2/8/2011, 2/17/2011 
Courtship Details: Non observed. 
Egg Size:  < 1.0mm
Egg Color: Clear/cream
Egg Count:  400 - 600 upto 800 

Hatch Details
Hatch Date: 
Hatch Time of Day: night
# Days after Spawn: 5
Larvae Description: 


Larval Tank Details
Temperature: 
Size of Larval Tank: 
Substrate Details: 
Other Tank Decor: 
Filtration Details: 
Lighting: 
Lighting Cycle: 
Water Changes: 

Larval Feeding Details
Food Types: 
Feeding Schedule: 

Metamorphosis/Settlement
Date of Settlement Start: 
Days after Hatch: 
Date of Settlement End: 
Description of Fry: 

Grow-Out Tank Details
Temperature: 
Size of Grow-Out Tank: 
Substrate Details: 
Other Tank Decor: 
Filtration Details: 
Lighting: 
Lighting Cycle: 
Water Changes: 
Size at Transfer: 
Age at Transfer: 

Grow-Out Feeding Details
Food Types: 
Feeding Schedule: 

Additional Information
Miscellaneous Information: 



You will be required to provide photographic evidence in this thread of each event submitted for the MBI Program.
If your thread does not contain these photos the MBI Committee will not be able to approve your reports.

Brood stock tank



 

Pairs





 

Eggs at 23 hrs

 

Eggs at 41 hrs

 

Eggs at 65 hrs

 

Eggs at 89 hrs

 

Eggs at 114 hrs

 

Nest



detail of egss at approx 58 hrs



 

 

12 hours post hatch.



 

Not sure on the black circle? air bubble maybe?

Total length = 2.3 mm approx.

 



 



 

 

Chris

What's going on in that second photo? I see that the spine is bent a little funny, so maybe the head is turned? But then the mouth is back going the same way the spine is. And those eyes a really close together in a weird position. Did you have a cover slip over it or something?
 
Thanks for all the photos, BTW. Nice work.

--Andy, the bucket man.
"Not to know the mandolin is to argue oneself unknown...." --Clara Lanza, 1886

Yeah, not sure on the spine. Did not notice till you pointed it out. Could be physical damage althought it was only transfered by water on a spoon.

The larvae was floating in a drop of water, alive. I'm guessing that the view is mainly from the bottom? Given this next photo from the top the spine maybe forced sideways a little.

Looking at larvae under the scope is new to me and not really sure on what I'm seeing.



 

Will keep an eye on other larvae.

 

Chris

- Unfed larvae at 60hrs: approx 10 left. all moving around on bottom or walls of tank.  21 deg C. 1.022 g/ml

Photo: unfed at 48 hrs



 



 

Spawn/hatch records page:

.          - Gobies and nest removed from tank 1 hr for cleaning 11/17/10
.          - Nest removed overnight for spawning 11/18/10

- New spawn/nest  sat 11/20/10 9pm 1 hr after lights out.

- Hatch 11/25/10 1 hr after lights out 

- New spawn/nest thurs 12/2/10 between 5.00 - 10.30 pm prior to lights being turned off, lights normally off around 9.30pm
.          - Large nest aprrox 1000 eggs
.          - peppermint shrimp added to tank 11/27/10, removed 11/30/10 due to living in
.            the same dead acro branch as gobies
.          - ran out of diy food mix 11/26/10 to 11/29/10 frozen mysis and enr. brine only.
.          - temps 24.5 to 27.0 deg.C. salinity. 1.022. 

- Hatch 12/7/10 1 hr after lights out.
.          - 50-60% hatch
.          - All eggs developed normally, unhatched darkened in last 12 hours (cream appearance)
.          - Female ate unhatched eggs when nest returned to tank. (within 1/2 hr) 
 
- New spawn/nest weds 12/8/10 1 hr after lights out.  
.          - Approx 800 eggs   

- Hatch 12/13/10
.          - Left lights on 1.5 hours longer, some hatching started prior to light being
.            turned off.
.          - Nest left in tank. Hatching % unkown.
.          - 27 oC, 1.023. PO4 0.1, no3 0.0, NH4 0.0

- New spawn/nest 12/16/10 after lights out.
.          - Aprrox. 700 eggs 

  - Hatch 12/21/2010
.          - Nest left in tank. Hatching % unkown.
.          - 24.5 - 27 oC, 1.021.
Pair given 100ppm hydrogen peroxide bath for 45 min followed by a 5min freshwater bath for relief of suspected Cryptocaryon sp. (aka white spot) symptoms.
Treated with quinine, 10mg/l for 10 days. Then, 2 x 3 day tank transfers with 100ppm perioxide baths for 45 min in between
- Feeding schedule. once per day for 5 days. twice a day for 2 days

- New spawn/nest 2/2/2011 after lights out (first spawn since meds)
.          - Approx. 700 eggs
.          - Temp 26 - 29.5 oC, 1.026
- Hatch 2/7/2011

- New spawn/nest 2/8/2011 after lights out
.        -Approx. 600 eggs
.        - Temp 26 - 28 oC, 1.027
- Hatch 2/12/2011
- New spawn/nest 2/17/2010
.         - Approx. 700 eggs
.         - Temp 26.5 oC, 1.026
.         - Feeding schedule. once per day for 5 days. twice a day for 2 days
Pair put into new system - 2/23/2011
Female missing - 2/27/2011. Likely accidental death.

Still trying to reason the bubble?
It is not there during hatching.
Read about air ingestion and swim bladder conditioning. This seems like a large bubble. Had me thinking about the previous hatch where some larvae were swimming on the bottom of the tank. Was hoping to look at both mid water and bottom dwelling larvae this spawn to see if the air was present in both but were unable to locate any on the bottom this time.
Maybe water quality or spawn condition? Accidental ingestion?
 
Likely the last of the egg/hatch photo's and maybe move on to rearing after the new year.
Post-hatch egg and larvae that darkened/died pre-hatch.

.

Made a silly error. Released some fish early from quarantine into the broodstock system.

 

The pair had a hydrogen peroxide bath and a freshwater dip. Will start treatment tomorrow on the whole system with either hypo or quinine.

A skin scrape did not show up much and not confident on ID of cryptocaryon but will post these.

X400 mag the first I have seen on scrapes of cryptocaryon infected fish before, the second I have no idea???



 

Chris

They're back

Quinine treatment for 10 days, ended due to losses from other suspected illness. All fish removed from broodstock system and treated with 2 x 3 day tank transfers with 100ppm perioxide baths for 45 min in between. Broodstock system, bleached and emptied.

New tank mates, 1 x pair of bangaii.

Same nesting acro, just whiter

I'm glad to hear that they made it through the sicknesses. Good luck getting them back to spawning.

--Andy, the bucket man.
"Not to know the mandolin is to argue oneself unknown...." --Clara Lanza, 1886

 
Thanks Andy. Unfortunately while doing a precautionary 50% water change on the new system I have the feeling the female was siphoned out. Will get another during the week and put into quarantine and start again with these guys.
 
Chris