Scientists in the US are trying to discover what caused the death of at least 9 fin whales, the bodies of which have been found in the waters near Kodiak Island, Alaska.
Normally only one or two dead whales are seen every couple of years. One theory is that the whales may have eaten something toxic, such as from a harmful algal bloom. One recovered whale appeared to be an otherwise healthy state.
Fin whales are the second largest whale and classified as endangered.
Photo © Tim Stenton