Species Name: Valoniopsis pachynema

Authority: (G.Martens) Børgesen, 1934

Range: Widespread in tropical seas, including the Gulf of California

Natural Environment: Form stiff, spongy mats of tangled filaments on intertidal rocks

Aquarium Suitability: Not a desirable aquarium species

Potential Control Species: Fish: See Chaetomorpha aerea

Crabs: Mithrax sculptus

Urchins: See Derbesia marina