Hitchiker on torch-

[basiab]

Hairlike tentacles turn around as if trying to catch something and then they curl in like fingers into a fist and it retracts into its home.
Picture was taken with moonlight so torch is retracted.
It is a _______.

 

[marrone]

Looks like a barnacle, which is common on Torches, Hammer and Frogspawns.

 

[lfsmarineguy]

Barnacle, like Mike, said. Harmless and they will orient to the current to better capture food.

 

[basiab]

Thanks