Breeding Journal, Species: Sepioteuthis sepioidea

DWhatley

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I have infertile octo eggs and Cyclopeeze that I can blow around them. I am getting crabs with eggs shipped Monday and will order Mysis when they hatch or the following Monday (depending on if they hatch before then or not). I did not expect hatching until next week but seeing them move around and how thin the casing is getting, it may be sooner but I hope not as I don't think they are ready. I am assuming that if they hatch before the yolk sack is completely absorbed, they will not survive (based upon cuttle eggs and the pictures of the hatchlings Philipp and Kara sent).

I am thinking about putting a breeder net around the eggs in the next day or so, just in case but I am worried that the eggs won't get enough flow. I may put a Koralia in the far corner of the tank when I add the net. I don't want a lot of current but am sure I need a gentle flow over the eggs (gauging from the loose sitting at the bottom of the plastic breeder that did not develop and turned opaque).

If they survive at all, I expect it will be more like keeping interesting fish and not at all like octopuses. They will go in my largest tank if they survive and I can get them catching and eating shore shrimp but just getting them to hatch and live a couple of weeks is my concentration at the moment. They are a lot smaller than I expected!
 

Cuddlycuttlefsh

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Just too excited for the squid

>0<

What material are you going to use for the tank, usually supplying enough food and the material used to make the container become the primary sources of problems when keeping captive squid.
 

DWhatley

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usually supplying enough food and the material used to make the container become the primary sources of problems when keeping captive squid.
Do you have a reference other than the ones I mentioned above?
 

DWhatley

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Day 14: First Hatchling 2012-02-16

I was afraid one of the squid might hatch very soon. The egg casing had a dead egg, had split, was very thing and the section with the live animal did not inflate well. I could see the little hatchling acvitely moving around and was not surprised when it popped out as I moved the eggs to be sure there was no algae growth (something I do daily). Fortunately, I caught it with my hand and Neal was there to put the breeder net (on standby just out of reach) into the water. It was not active for about the first hour and just rested on the bottom of the net breathing. There is still a good amount of yolk sack that has not been absorbed so, assuming this part is like cuttlefish, the chances of survival are nil. Once it attempted to swim, it was clear that the yolk sack was a hindrance but it is still alive after 6.5 hours so we will see if it makes it through the night.



 

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DWhatley

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Conclusion

Sadly with a not so great ending.

Five eggs hatched. I saw two (the last really tiny one I accidently forced cleaning up the tank as I did not realize there was one still left) and both had large yolk sacks. The other three I did not see at hatching and had no yolk sacks when I spotted them. All but the last lived for about 24 hours but no more (only a few hours for the last one). They acted more benthic than pelagic and stayed primarily at the bottom of the net but would swim when disturbed. The yolk sacks made swimming an effort and disappeared within a few hours (I think detached, not absorbed).

Hatchlings were place in a large breeder net in the same tank.all hatchlings were found. Hatchlings were easily hand caught and moved to a second net in the same tank without taking them out of the water.

I hatched out brine shrimp since the food I had planned for (crabs with eggs and mysis) was not ordered soon enough. The new hatched brine was mixed with Cyclop-eeze when introduced to the net. Only one squid seemed to try to eat (the second to hatch) and only during the first feeding attempt. It started swimming when the brine was introduced but I could not see any red in the body to tell if the Cyclop-eeze was being eaten.

I experimented slightly with gentle current. I placed a small Koralia in thank and aimed it at the bottom of the tank, causing a reflected upwelling of water into the net. I also tried aiming the Koralia at the back of the tank for a different reflective pattern. The current did not produce obvious changes. Any direct flow into the net would blow them around but no direction kept them off the bottom of the net. The sides of the net did not seem to have any influence. I added a piece of live rock to the net to see if the would shelter there. The weighting down of the net in the center did collect the animals but the rock did not seem to provide any form of intentional sheltering.

What I learned positive.

1. Hanging the eggs is required. Those left sitting on the bottom of the net did not develop. One that was hanging and was developing died after it fell and sat on the bottom of the net for only 2 days.

What I would/will try differently if I have a second opportunity:

1. Increase temp slightly to encourage growth/maturity more rapidly hoping hatching will not occure while yolk sack is not absorbed.

2. Order food when eyes appear.

3. Try a round container to see if the benthic behavior is associated with container shape (will use a bio-orb). There was no indication that sides made a difference but the Steve found round important with other species.
 



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