No obvious cause of death for this adult and juvenile otter.

CBC Radio’s What on Earth travelled to Yukon this summer to explore how a warming climate has threatened chinook salmon, endangering not just the species but a cultural keystone for some Indigenous communities.

"Grayling guts with unknown pearl like cyst or tapeworm. Never seen this before in our grayling."

With a bleak salmon return this year in Northwest Alaska, a lifelong fisherman reflects on a season marked by empty nets and big questions.

Orcas are starting to show new feeding behaviors around large trawler nets. They’re trying to steal fish caught in nets that are typically being hauled back. Scientists aren’t sure why orcas are doing this, but it’s dangerous for them because it increases their chances of getting caught in the net and dying.The problem is so bad that some fishermen have decided to skip fishing for black cod this year.