So I have 2 pipefish in my tank. They've been in there for about a month now and get along with every single tankmate. The tank is a 55g, that houses 2 pipefish, 1 melanarus wrasse, 1 occelaris clown, 1 firefish, and 1 royal gramma. Today when I woke up, one of the pipefish was hooked onto the bottom of the filter (just holding onto it without being sucked in or anything). He's been staying like that since I woke up and hasn't even moved during feeding time. Is he just chilling or is it something more then that? Thanks in advance for help!