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Anyone have a Biscuit Starfish eat their corals?

SupraSaltyReefer

SupraSaltyReefer

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Anyone have a Biscuit Starfish (Pentagonaster dubeni) in there tank? How long have you had it for? Has it eaten any of your corals?

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This is speculation from my part so take with healing cup of salt

lowering temp from 26 to 23c results in oxygen solubility increase from 6.62 to 6.96 mg/l according to a chart online, just over 5% increase

proper gas exchange probably matters too, especially at night when respiration: primary productivity ratio is greater

Recommendation for oxygenation during fish dips seem to lower temp, drop salinity, and add aeration - aside from dropping salinity, I feel like this is doable in a tank
I have seen H2O2 oxygen generators in freshwater. not sure if applicable here
 
In general, I’m sure it’s a handling and husbandry issue along the way.
And I’m sure many hours in a small bag with minimal water that was probably “dirty” prior to shipping doesn’t help
Probably best to leave them on the reef
 
tribbitt said:
This is speculation from my part so take with healing cup of salt

lowering temp from 26 to 23c results in oxygen solubility increase from 6.62 to 6.96 mg/l according to a chart online, just over 5% increase

proper gas exchange probably matters too, especially at night when respiration: primary productivity ratio is greater

Recommendation for oxygenation during fish dips seem to lower temp, drop salinity, and add aeration - aside from dropping salinity, I feel like this is doable in a tank
I have seen H2O2 oxygen generators in freshwater. not sure if applicable here
Click to expand...

Generators and even compressed are used in both fresh and saltwater AC quite extensively. We used the bagging o2 tanks in our wholesale facility in cubes at times. LOX is a thing as well (liquid O2)
 
Those stars are so crazy beautiful!! What tank are you keeping them in and the
temperature?
When I was looking into them there was alota conflicting advice on husbandry! I couldn’t find hardly any research studies or papers and the sites that sold them all gave different info and not much! But when you look into where they are thriving and collected they are in colder water temps from mid 40’s to max 72 degrees Fahrenheit so they would die in our current tanks which is why I took a pass for now anyway lol.. Definitely a cold water tank in the future!
Current water temp which are the warmest months atm
Sydney 64F
Melbourne 60F
Tasmania 56F
If you can breed pineapple sponges on rocks Ive heard of them eating those also crushed up seafood krill/fish. Fresh live clams that are smashed with a hammer then tossed in..In a few cases nori rubber banded on rocks or masstick
The bonfire biscuit is super groovy
Keep us posted !
Good luck


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PjFish said:
Those stars are so crazy beautiful!! What tank are you keeping them in and the
temperature?
View attachment 74761
Click to expand...
There’s a lot of conflicting info out there on them and they get misidentified a lot. This pic you posted shows the African type ( Goniaster tessellatus) but has it labeled as Pentagonaster dubeni which is from Australia. Same type I have. I have them in my garage tank which is normally 76 and gets colder at night and dips down to 74ish.

Day 5. They found the sponge rock!
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