Main kelp tank at macduff aquarium. The main kelp tank is five metres deep by ten meters wide, and unique in europe as It is open topped. The species in this exhibit are: Halibut, Blonde ray, Thorn back ray, Lesser spotted dogfish, Smoothound, Cuckoo wrasse, Ballan wrasse, Goldsinny wrasse, wolf fish, Bass, cod, Haddock, Pollack, saithe, ling, Large spotted dogfish, Atlantic salmon, Conger eel, Bull huss shark.- 12th February 2013.