Crumb-of-bread sponge
- kingdom: Animalia
- phylum: Porifera
- class: Demospongiae
- order: Suberitida
- family: Halichondriidae
- genus: Halichondria
- species: Halichondria bowerbanki
Zeebrugge
Flanders
Belgium- France
Haamstede- Vlissingen
Zeeland
Netherlands
Horta
Azores
Portugal
Alameda- Albany
- Bayview
- Belvedere
- Berkeley
- Black Point-Green Point
- Bodega Bay
- Brisbane
- Channel Islands Beach
- Coronado
- Costa Mesa
- Emeryville
- Eureka
- Foster City
- Inverness
- Marin City
- Marina del Rey
- Morro Bay
- Newport Beach
- Oakland
- Oxnard Shores
- Port Hueneme
- Redwood City
- Richmond
- San Diego
- San Pedro
- Santa Barbara
- Sausalito
- South San Francisco
- Strawberry
- Tiburon
- Vallejo
California- Branford
- Branford Center
- Milford
- New Haven
- West Haven
Connecticut- Crisfield
Maryland- North Bend
Oregon- Charleston
South Carolina- Gloucester Point
Virginia
United States
Dinard