Can you help me to identify?

[MyReefXperience]

I've found this this morning but I've no idea of what is it. Does anybody know?

PS: I have created another topic before with the same content but I'm not able to open it. It shows me an error message and I don't know if I did something wrong or it's anything about tapatalk, the forum, the server...
If it was my fault I'm so sorry.

 

[MyReefXperience]

Some videos

https://vimeo.com/178781510

https://vimeo.com/178781551

 

[Ron Reefman]

It's hard to make a positive ID when all we get to see is the underside of the critter in question. Maybe you could pull one out of the tank and put it in something so you can take a good photo of the top side?

Based on the length compared to the width, my first guess would be a chiton. Is the shell on it's back segmented into 8 parts?

Here is a link: http://www.molluscs.at/polyplacophora/index.html?/polyplacophora/main.html

 

[SeaCucumberFan]

I'd say chiton. Good for your tank

 

[Dogshowgrl]

Chiton. Great cuc. Algea eaters that most people would love to have!

Sent from my Nexus 5 using Tapatalk

 

[Sugar Magnolia]

Yep, chiton.