Star marking in Costa Rica

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quesara

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Hi all -

I saw something in passing today that was Odd. I didn't have time to stop & really check it out as was already trying to catch up to the group in 20 ft vis.

The "thing" in question had very dark (black?) background with a white 5-point star marking. The odd part was that it was a perfect 5pt star like one would draw with a single line without taking the pencil off of the page (points connected with intersecting lines). Very smooth surface, almost like chalk on a chalkboard. Very topside-human-ish.

The limited info: northwest coast of Costa Rica, morning dive, warm water (22C), ~15m, tucked under a lip of reef. The star couldn't have been much more than 15mm across. As mentioned above, all I really saw was the distinctive marking; I don't know if it was on a vertebrate, invertebrate, or bit of human rubbish. Nothing moved in the few seconds I had to look; I did not get a gut instinct of 'fish'...

Bit of a shot in the dark, but the star is odd enough that I'm hoping someone know what the heck I saw!
 
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