Unique flatworm ID

[Ojala]

Hi, I just started finding these flatworms in my tank. They are normally on my live rock and not on coral. They have a hard texture, with a pattern on their back. Does anyone know what specie of flatworm they are, and if they’re something I should be worried about?
thanks in advance!

 

[Crabs McJones]

Chitons, not flatworms at all
Great clean up crew members

 

[KJ]

Hard to tell fro the pic?Look like this.

 

[Ojala]

Hard to tell fro the pic?Look like this.

The colors on these look much more vibrant, but they have the same pattern/shape. What are they?

 

[Crabs McJones]

The colors on these look much more vibrant, but they have the same pattern/shape. What are they?

Chitons

 

[Ojala]

Chitons, not flatworms at all
Great clean up crew members

They look similar, but I’m not 100% sure. I’ll look more into it, but I’m hoping you’re right lol.

 

[KJ]

The colors on these look much more vibrant, but they have the same pattern/shape. What are they?

Isopod serolid.

 

[Bob Loblaw]

Chitons come in many different colors/patterns