What arachnids live in the ocean?

Answer 1

While most arachnids are terrestrial, a few specialized species have adapted to marine environments. The most notable ocean-dwelling arachnids are certain types of sea Spiders, belonging to the class Pycnogonida. These creatures are characterized by their long legs and small bodies, and they inhabit various ocean depths. Additionally, some members of the order Solifugae, or camel spiders, have been found in coastal areas, but true marine adaptations are rare among arachnids.