ID Help

[dlynch8802]

Found this on my rock. Not sure what it is. Any help would be great. Thank you in advance.

 

[dlynch8802]

Here's a better picture

 

[cloak]

Limpet. (harmless)

http://www.lionfishlair.com/hitchhiker.shtml

 

[dlynch8802]

Thanks for the help!