Are these 2 things on my new fighting conch limpets?

[ipunchedbigfoot]

Got a new fighting conch today and noticed two snail like critters attached to the back of him grazing on detritus in the sand behind him. Maybe limpets? I cant figure out how to post videos so here is a gif: Limpets? https://imgur.com/gallery/DKoIbIp

 

[JumboShrimp]

I have one or two on my conch, even larger. Don’t know what they are (someone else here at R2R will), but they never caused a problem.

 

[kirstyflash]

Slipper limpets

 

[kirstyflash]

This is my trochus with several. Every now and then the shell lifts slightly and a little trunk comes out. As far as I know that are algae grazers or filter feeders.

 

[reef lover]

Yup slipper limpet...nabs up morsles as the host moves about.