malformalady:A massive, tubular colony of Giant fire salps(Pyrostremma spinosum) photographed off
malformalady:A massive, tubular colony of Giant fire salps(Pyrostremma spinosum) photographed off Montague Island in NSW, Australia. The wall of the tube is made up of individual animals (zooids) that are embedded in a gelatinous test. Photo credit: ©Roger Fenwick -- source link