griseus:

From the genus Magnapinna, the Bigfin Squid’s long tentacles can grow up to four and six meteres (13-29 feet). Their purpose? Scientists speculate that they run them along the sea floor to snatch prey. 

• gif source:MBARI(2001)
• Image: taken from this video
• Interested about genus Magnapinna? here more info via Tolweb

Ia! Ia! Cthulhu Fhtagn!