With Seachtain na Gaeilge now well underway, our Irish language officer Cian Ó Nialáin takes a look at some of our most commonly sighted cetaceans, starting off with the humble 'muc mhara' or Harbour Porpoise! The harbour porpoise is the smallest of cetacean species recorded in Irish waters, and though it is one of those most commonly sighted from our shores, recently published research appears to represent a species under pressure. Cian reminds us that you can report sightings and strandings of