Place fish in anaesthetic. Marking the trout. Irish Bay, Kerguelen Archipelago.

introduced species natural reserve cloud scientist adult man alone posing animal tagging high angle view overview indian ocean kerguelen islands fr salmonidae zoology temperate freshwater fish invasive species trout january alien species french southern and antarctic lands nature reserve nature reserves nature reserve cloudy clouds cloudy sky scientists adults men single lonely only solo one lone posed pose settlings settling animal taggings high angle shot overhead shots overhead shot overhead sight overhead sights overhead view overhead views overviews global sight global sights full length zoologies zoologist zoologists zoologicals zoological cold freshwater fish river fish temperate freshwater fishes cold freshwater fishes river fishes trouts exotic species non native species non indigenous species destruction of biodiversity environment environment protection environment management biodiversity management sky meteorological phenomenon meteorology science scientific research stage of development individual person population management species management world sea and ocean taaf france european union europe salmoniformes actinopterygii euteleostomi gnathostomata vertebrata chordata deuterostomia coelomata bilateria metazoa opisthokonta eukaryota discipline freshwater fish fishes particularity species particularity species salmonid actinopterygian bony fish fish animal vertebrate chordate wild animal animal