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Maratua critters ID help


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#1 ajay

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Posted 29 December 2017 - 01:23 AM

Hi friends,

Need your help to identify the critters in the two attached images.

 

The mollusc (??) burying itself in the sand is ~2cm; there were many of these spread out around the sandy bottom at the house reef on a night dive.

 

The tiny orange critters on the sponge are no more than 1mm each; they look like baby shrimp/crabs just emerging out of eggs??

 

Any help appreciated!

Ajay

Attached Images

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  • xx_02880s.jpg


#2 trygon

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Posted 29 December 2017 - 05:19 AM

The first image is an Echinoderm of some sort, maybe an urchin, the second maybe an isopod.


Bryce Gibson
Knoxville, Tennessee

“If you want to catch beasts you don't see every day, You have to go to places quite out of the way, You have to go to places no others can get to. You have to get cold and you have too get wet, too.” Theodor S. Geisel


#3 trimix125

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Posted 29 December 2017 - 05:22 AM

Hi,
number one is a kind of sea urchin, maybe Maretia planulata.

The second shows Commensial Sponge Isopods Santia Sp.

Regards,
Wolfgang

 



#4 ajay

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Posted 29 December 2017 - 06:05 AM

Thanks Bryce, Wolfgang.

 

Ajay