I found a black sac in the atlantic ocean and was wondering what it was. It was black and leathery looking and

it was black andleathery looking and it was in kind of a square with 2 points on each end that curled up
Answers:
Mermaids purse, the egg of a skate or a ray or at least the casing of it. Did it look something like this:
http://www.jaxshells.org/926c.htm. ?
Dogfish and some sharks lay eggs similar to that.
Here's more info:
http://en.wikipedia.org/wiki/mermaid%26#039;s_p.

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Whats your question????

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Yeah, thats called litter. The ocean is filled with random garbage.

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Why, its a black leather looking sack that's squarish with two points on each end that are curled up; what else?

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Some black guy must be pissed that he lost his leathery sac

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it is a shark egg . google "shark egg" and you will see or try the llink below


http://www.southernshores.auz.info/beach.

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it may be a shark egg caseing just get some water from the ocean and put it in there it may hacth than you can put the baby sharks back into the ocean. sound good?

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it's an egg case from a sting ray