The Salenioida are an order of sea urchins.
The Salenioida are an order of sea urchins.
== Description and characteristics == They are distinguished from other sea urchins by the presence of a large plate on the upper surface, with the anus to one side. They have very large tubercles between the ambulacral plates, and much smaller ones on the ambulacral plates themselves.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).