name a fictional character whose relative is list of disney's the little mermaid characters and species is mermaid ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_relative dbr_List_of_Disney's_The_Little_Mermaid_characters sep_dot var_uri dbo_species dbr_Mermaid sep_dot var_uri a dbo_FictionalCharacter brack_close