description Tripneustes gratilla Overview
*Tripneustes gratilla*, or the collector urchin, is a regular sea-urchin belonging to the Toxopneustidae family. It’s notable for its unique behavior of collecting and hoarding foreign objects – shells, pebbles, and even small fish – around its body. Found exclusively in the Indo-Pacific region, this extant species is primarily collected by marine enthusiasts and researchers studying invertebrate ecology.
insights Ranking position
Tripneustes gratilla ranks #9 of 127 in the Sea Urchin ranking, behind Echinothrix calamaris, ahead of Mesocentrotus nudus.
help Tripneustes gratilla FAQ
Why does Tripneustes gratilla cover itself with shells and debris?
The collector urchin uses tube feet to hold shells, stones, algae, and other loose material over its upper surface. This covering may provide camouflage and protection from strong sunlight or predators.
Where does the collector urchin live?
Tripneustes gratilla occurs across the tropical Indo-Pacific, including waters around East Africa, Japan, Hawaii, and Australia. It commonly occupies shallow seagrass beds, reefs, and sandy areas where plant material is available.
What does Tripneustes gratilla eat?
It mainly grazes on algae and seagrasses using the five-toothed feeding structure called Aristotle's lantern. Its appetite has also led to experimental use in controlling invasive algae in Hawaiian reefs.
Is Tripneustes gratilla dangerous to handle?
Its short spines can puncture skin, and members of the Toxopneustidae family possess defensive pedicellariae. It should be observed without handling, especially because disturbing an urchin can damage both the animal and its reef habitat.
explore Explore More
Similar to Tripneustes gratilla
See all arrow_forward
Reviews & Comments
Write a Review
Be the first to review
Share your thoughts with the community and help others make better decisions.
