Salish Sea Sea Spiders Discovery

Researchers at the University of British Columbia have discovered two new species of sea spiders in the Salish Sea, marking the first new species described in the region in nearly a century. Published on August 26, 2026, in the journal Organisms Diversity & Evolution, the study highlights how little is known about local marine invertebrates amid growing environmental threats like climate change. The research expedition, led by master's student Cormac Toler-Scott between September 2023 and August 2024, utilized diving depths of up to 18 meters around Quadra Island, Vancouver, Bamfield, and Victoria. The team combined morphological examination with DNA sequencing and detailed microscopic imaging to document Callipallene pilosuspedes and Tanystylum kiixin. Callipallene pilosuspedes features bright red eyes, long curved comb-like spines on its lower legs used for precise grooming, and a three-lipped mouth surrounded by sensory tendrils. In contrast, Tanystylum kiixin possesses smaller egg-carrying limbs and accumulates debris, hosting tiny protist parasites that create a complex nested ecosystem on the spider's body. These findings bridge a century-long biodiversity gap in the Pacific Northwest and emphasize the urgent need for comprehensive species cataloging and conservation efforts. By establishing a reliable genetic database and identification guide, the study equips marine biologists to better monitor and protect vulnerable coastal ecosystems against ongoing human and climate disturbances.