I just know the full translation:

"Captain, I see your sail on the horizon! Catch a crab and 100 Rubies! Seven feet under the keel!Bloody Mary, mistress of the sea."

I have no idea where it is either.

I got it too and I asked. It seems that it's a minor glitch, likely a test parrot somehow escaping to the production. I'll let them know that I wasn't the only one to get it, so they can look into it, but I wouldn't hold high hopes for either crabs or rubies.

I'll let you know if I find out anything more.

In the mean time, good luck and crabby seas! 

Darth Righteous said:

Has anybody figured out where the crab is for the ruby reward?

Hello!

Alina said:

Thanks for reporting this. I've forwarded this case to the devs. Have a nice day! 

Sooo... no crabs for us? Can we, at least, get some shrimps? 

Truth be told, I'd rather have a steak or a burger... 

I just know the full translation:

Seven feet under the keel!Bloody Mary, mistress of the sea."

I have no idea where it is either.