competitor
http://fishdelish.cs.man.ac.uk/rdf/species/Auxis/thazard_thazard
http://www.fishbase.org/entity#katsuwonus_pelamis
http://www.fishbase.org/entity#thunnus_alalunga
http://www.fishbase.org/entity#thunnus_obesus
http://www.fishbase.org/entity#xiphias_gladius