"The Mermaid" by Eva Sandoval in Gris-Gris

The mermaid’s head jerked; she saw Davey watching her and the fish flopped limply in her hands, like a deadening heartbeat.
Then the mermaid’s mouth twisted, and she retreated into the Gulf with an aggressive splash. Her tail was long and gray, slimy with scales, and crusted with barnacles like the bottom of Uncle Chet’s boat. Read story here.