Need Help Identifying these weird bugs/pests??

[blitzzfiree]

Hey guys I’m new to the saltwater scene and have had this 20 gallon tank for about 4 months so I’m not sure as to what hitchhikers are good and bad but I just seen this guy today and wanted to know on what to do with it.

 

[blitzzfiree]

Hey guys I’m new to the saltwater scene and have had this 20 gallon tank for about 4 months so I’m not sure as to what hitchhikers are good and bad but I just seen this guy today and wanted to know on what to do with it.