Need help identifying potential tail fin. Found on beach in Haida Gwaii.

[HaidaGwaiiBeachFinds]

Hi All!

 

This peculiar find reminds me of a type of marine mammal fin upon first sight. Haven’t come across anything remotely like it before. 
 

-20cm long, 15cm wide

-found on a beach in Haida Gwaii (close to Alaska)

 

Thank you!

[Coco]

Hi,

 

The second photo shows the imprint of a bivalve that looks like pectiid.

 

Coco

[Rockwood]

The circular shapes on the other side are barnacles that were growing on it.

[Mahnmut]

Interesting piece,

looks like the skapula of one of Davy Jones´ men.

I always like fossils that contain different species like this one- with the barnacles, bivalve and pirate.

Best Regards,

J

[Rockwood]

Aarrrh ! Me thinks he be joshin' ya mates.