Our blog series on the lesser known (but just as cool) species of the Arctic continues with Arctic copepods. Read our other blogs from the series: polar cod and brittle stars.
I’ve always loved ribbon seals, narwhals and ringed seals to name a few cute Arctic creatures. While these beautiful animals get all the glory, they wouldn’t be around for these important little guys at the base of the food chain: meet the copepod!
“Copepod” means oar-footed, and that is how these aquatic crustaceans, often called “insects of the sea” move around. They use their four to five pairs of legs as well as their mouth and tail to swim. In the Arctic, copepods live on the seafloor, in the water column and on the sea ice. In the water column, there are more copepods than any other multi-cellular organism.
Copepods come in many forms—some are filter feeders, some are predators. Copepods have two major life forms and grow by shedding their shell. They go through 12 stages after hatching—that’s a lot of wardrobe changes! By our standards, copepods are tiny, measuring in at 0.3 to 2cm long at full size.
The animal kingdom is packed with creatures that use strange and unusual methods to trick predators. From finding expert camouflage to playing dead, deceit is a common way to avoid becoming someone’s snack.
But when it comes to trickery, there is one animal that rises above the rest: the mimic octopus.
In honor of April Fools’ Day, we’re sharing the story of a cephalopod that has taken the field of deception to a whole new level. So sit back and learn from the best (and don’t forget to take notes!)
Our blog series on the lesser known (but just as cool) species of the Arctic continues with brittle stars. Read our other blogs from the series: polar cod and Arctic copepods.
Brittle stars are seafloor dwelling organisms that appear to be a quirkier, more slender version of a starfish. Although they are closely related to starfish—brittle stars differ in many ways.
Brittle stars have a distinct central disc and (usually) five skinny, flexible arms. The central disk (approximately 2.5 cm in diameter in the species Ophiura sarsii) consists of a skeleton of calcium carbonate and contains all the brittle stars’ internal organs. The disk’s appending five arms (circa 9 cm long in Ophiura sarsii) twist and coil to enable movement across the seafloor. Not only do their arms enable locomotion: brittle stars can purposely release on or move arms to evade a predator! As long as its central disk remains, the brittle star will continue to function, and its limbs will regenerate.
Join us as we dive into the chilly waters of the Arctic. Our blog series explores the magnificent (and often overlooked) species living in the Arctic—which you need to know! Read our other blogs from the series: brittle stars and Arctic copepods.
When most of us think of important Arctic marine species, we generally think of walrus, narwhal, seal, beluga and others. Although those species capture our imagination and are special to the Arctic, there are a number of lesser known species that may not have the same charisma but are equally, if not more, important for helping maintain the Arctic marine ecosystem. As a person who has always loved marine fishes, I’ve long thought polar cod (Boreogadus saida) are an exceptionally fascinating Arctic fish that just does not receive the attention it should.
March 20th marks the first day of spring, but sometimes the weather can make it a little difficult to identify the true beginning of the season. Luckily there are some other signals that the warmer months are coming up. Marine animals of all kinds, from seabirds to giant whales, can be great identification tools for spring. To celebrate this change, we are telling the stories of some amazing marine animals who are known for signaling this season. If you weren’t already excited for some warmer weather, here are a few of the incredible behaviors exhibited by marine animals during this time of year to get you in the spring spirit.
Last week, some of the best and brightest women in conservation came together to discuss their experiences in the field. The Twitter chat, hosted by Ocean Conservancy in honor of International Women’s Day, emphasized the importance of encouraging young women interested in science and supporting fellow females in conservation. Dozens of participants shared stories, photos and advice about the thrills and challenges of being a woman in the industry.
Every year a crowd of fisherman and fishing community members gather in Astoria, Oregon, to share stories, recite poetry and sing music. FisherPoets, founded by a small group of Pacific Northwest fisherman in 1998, is an opportunity for the commercial small-boat community, friends and locals to gather together away from the docks. No trips to the store, no scrubbing of decks, no mending of nets. Just friends, family and plenty to drink.