Life can be stressful for anemones. Fortunately, the green microalgal symbionts in some anemone tissues provide them with nutrition and antioxidants that help them cope with stressors.
Because of the walrus’s dependence on ice, the greatest threat to walruses is the loss of ice due to climate change. 2023 was the sixth-warmest year in the Arctic since reliable records began in 1900, and the 2023 summer was the region’s warmest on record.
Beetles come in a diversity of shapes and sizes. Ladybugs may be the most familiar and beloved beetle but there are 350,000 described species of beetles. That means there are likely thousands more that scientists don’t know about.
A spectacular-looking example of an animal in the plankton is Glaucus, a pelagic (open sea) sea slug. Sea slugs are nudibranchs, in the mollusc phylum. The blue glaucus (Glaucus atlanticus) is also called the blue dragon, sea swallow or blue angel.
Clam Worms use their body segments (parapodia) in locomotion, to move and burrow into sand and mud. These segments are also used for respiration and sensing the environment. The parapodia are covered in sensory bristles that can “taste” chemicals in the water and sense current changes and act as feelers.
Important in the diverse deep-sea habitats where they live, brittle stars are ecosystem engineers, stirring-up sediment as they dig, recycling nutrients on the seafloor in the process. And they’re important prey of fish and various invertebrates including crabs and sea stars.
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