In 2017, divers exploring waters near Kumejima surfaced with photographs of a strange marine animal they had spotted during their dive.
The tiny creature measured only about 2 centimeters (0.78 inches) long, but its unusual markings immediately captured scientists’ attention.
Among those intrigued was marine researcher Naohiro Hasegawa, who first encountered photos of the animal while browsing social media in 2018.
Its unusual appearance suggested it might be something entirely new.
The “Skeleton Panda Sea Squirt”
After several years of additional research and observation, scientists officially described the species in 2024 in the journal Species Diversity.
The new species was named Clavelina ossipandae.
The name reflects its appearance:
- Clavelina refers to the small bottle-like shape common among these animals
- ossipandae combines Latin words meaning “bone panda”
Its Japanese nickname, “gaikotsu-panda-hoya,” also translates to “skeleton panda sea squirt.”
The name comes from the creature’s distinctive patterns that resemble a panda’s face.
Why It Looks Like a Panda
The unusual markings aren’t actually eyes or facial features.
According to Hasegawa, the white areas that look like bones are actually blood vessels running horizontally through the animal’s gills.
Meanwhile, the dark spots that resemble a panda’s eyes and nose are simply natural pigmentation patterns.
Scientists still don’t know exactly why these patterns evolved.
Nature’s Tiny Water Filter
Like other sea squirts, Clavelina ossipandae feeds by filtering seawater.
These animals draw water in through small openings called siphons, trapping plankton and tiny organic particles as food.
Marine biologist Giorgia Carnovale explains that sea squirts function almost like natural cleaning pumps in the ocean.
Their mucus-covered filtering system captures microscopic debris, helping remove pollutants and even microplastics from the water.
Because of this ability, some scientists believe sea squirts could play an important role in improving ocean health.
Small Creature, Big Impact
Although the skeleton panda sea squirt is tiny, its discovery highlights how much of the ocean’s biodiversity is still unexplored.
Researchers hope that studying these fascinating filter-feeders could provide insights into marine ecosystems — and perhaps even new ways to help protect the planet’s oceans.
Sometimes, even the smallest creatures can make a big difference beneath the waves. 🌊