The siphonophore Hippopodius hippopus is usually transparent, but when disturbed it suddenly becomes milky white.
CreatureCast is a collaborative blog produced by members of the Dunn Lab at Brown University, along with assorted friends. This project, which is focussed on zoology in the broad sense, serves as a forum to present original content that we have produced and observations by others that we find interesting and beautiful. Support for some original podcast content is provided by the National Science Foundation (NSF). Mollusc themed podcasts are supported by a collaborative NSF research grant to Casey Dunn, Gonzalo Giribet, and Nerida Wilson.
The green urchin and the pencil urchin are alike in many ways, but their differences matter in a big way when it comes to their ecological impacts.
A look into the microscopic army in every cnidarian that's just waiting to sting you.
Cuttlefish can alter their color, texture, and apparent shape. This extraordinary camouflage allows them to hide in plain sight against many different backgrounds.
Many organisms move with cilia. Most, like Stentor, are small
This episode explores how nudibranchs steal jellyfish stinging capsules to defend themselves while also getting a good meal
This is the story of a parasitic barnacle with a fascinating lifecycle
Shuyi Chiou's animation explains the implications of the Central Limit Theorem
Nina Ruelle tells the story of Tyrian Purple, a dye created from the marine snail known as Bolinus brandaris
This episode of CreatureCast tells the story of how echinoderms (starfish, sea urchins, and their relatives) can change the stiffness of their skin at will.
Kevin Rogers, a student at Brown University, explains how a little pistol shrimp manages to pack a big punch through creating cavitation bubbles.
How does the nautilus swim underwater, even though it has no fins and lives in a shell?
Stephanie Yin, from Mark Bertness's lab at Brown University, tells the story of how marshes in New England have died back as populations of the crab Sesarma have grown.
Rebecca Haumann, from Erika Edwards' Plant Diversity course at Brown University, describes how different plants cope with drying out.
Discussing the life and times of ginkgo trees
Humans have a front and a back and two legs. We walk around on our two legs. When we need to change the direction we are moving in, we first turn our body to face the new direction and then use our same two legs to keep going. It works for us. But, what about a round animal that also has an odd number of limbs?
Riley Thompson, from the College of the Atlantic, tells the story of how animals become invisible.
Human's co-dependent relationship with corn
The story of how anglerfish find, and keep, a mate
Here is a little plant that starts it's life high up in the tree tops, where it can find more light than the dark understory of the rainforest. As it grows though, soon getting enough water becomes limiting factor, and the plant will drop a shoot to the ground.
Dr. Roger Hanlon who studies cephalopod camouflage describes the mesmerizing "passing cloud" pattern and the purpose behind this agonistic display
The curious life-cycle of the Symbion pandora
This video introduces the moray eel and describes the amazing way they eat
In this installment of CreatureCast, Casey Dunn describes how siphonophores help us question what we think of as an individual.
This episode covers the evolution and development of multicellular organisms
This episode discusses the work that's been done in the Morse lab on squid iridescence
The life cycle of the fried egg jellyfish
The community that is coral
The wonders of comb jellies
This episode of Creaturecast dicusses how comb jellies move in the same way that many single-celled organisms do