also: うみぐもるい
sea spiders
Refers to the class Pycnogonida, marine arthropods with long legs and a small body.
Sea spiders inhabit oceans worldwide.
Katakana spelling is standard for this taxonomic group.
Kanji spelling is rare and mainly used in older or specialized texts.
Compound of ウミグモ (sea spider) + 類 (class, kind). The exact derivation is uncertain, but the term is a straightforward taxonomic label.