Rock Scallop

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Rock Scallop

Crassedoma giganteum
(formerly Hinnites giganteus)

In-depth Information Regarding this Species

Alternate Common Names Purple-hinged Rock Scallop, Giant Rock Scallop (O'Clair and O'Clair 1998)

U.S. Range in the Pacific Ocean Common
British Columbia to Baja (Haderlie and Abbott in Morris et al. 1980)

Habitat Rock crevice, pilings, floats (Haderlie and Abbott in Morris et al. 1980)

Substrate N/A

Depth range (meters) Intertidal to 50 (Haderlie and Abbott in Morris et al. 1980)

Behavior Can swim as a juvenile (Anderson 2001)
Once 2.5 cm in diameter individuals cement self to rock (Haderlie and Abbott in Morris et al. 1980)

General Temperature Range (°C) N/A

General Salinity Range (ppt) N/A

Maximum Overall Recorded Size (cm) N/A

Maximum Recorded Size for Males (cm) N/A

Maximum Recorded Size for Females (cm) N/A

Average Maximum Overall Length (cm) Up to 30 (diameter) (Anderson 2001)
25 (diameter) in subtidal area
15 (diameter) in intertidal area (Haderlie and Abbott in Morris et al. 1980)

Average Maximum Overall Length for Males (cm) N/A

Average Maximum Overall Length for Females (cm) Females are larger than males (O'Clair and O'Clair 1998)

Average Maximum weight (kg) N/A

Average Maximum weight for Males (cm) N/A

Average Maximum weight for Females (cm) N/A

Length When Harvested (cm) N/A

Weight When Harvested (kg) N/A

Overall Length to Age Ratio (cm/age in years) N/A

Male Length to Age Ratio (cm/age in years) N/A

Female Length to Age Ratio (cm/age in years) N/A

Overall Maximum Age (years) 25 (Haderlie and Abbott in Morris et al. 1980)

Maximum Age for Males (years) N/A

Maximum Age for Females (years) N/A

Age when Harvested (years) N/A

Overall Growth Rate N/A

Male Growth Rate N/A

Female Growth Rate N/A

Overall Age at Maturity (years) N/A

Male Age at Maturity (years) N/A

Female Age at Maturity (years) N/A

Overall Length at Maturity (cm) N/A

Male Length at Maturity (cm) N/A

Female Length at Maturity (cm) N/A

Maturity/Temperature Relationship N/A

Type of Reproduction Protandrous hermaphrodites (O'Clair and O'Clair 1998)

Fecundity N/A

Spawning Habitat N/A

Spawning Behavior N/A

Time of Year of Spawning April (California) (Haderlie and Abbott in Morris et al. 1980)
Mid-May–mid-June (Puget Sound) (O'Clair and O'Clair 1998)

Number of Spawns per season N/A

Spawning/Temperature Relationship (°C) N/A

Spawning/Salinity Relationship N/A

Description of Eggs N/A

Habitat where Eggs are found N/A

Days to Hatch N/A

Time of Year when Eggs Hatch N/A

Temperature for Egg Survival (°C) N/A

Salinity for Egg Survival (ppt) N/A

Predators on Eggs N/A

Habitat where Larvae are found Planktonic (O'Clair and O'Clair 1998)

Days in Larval Stage 60 (O'Clair and O'Clair 1998)

Temperature for Larval Survival (°C) N/A

Salinity for Larval Survival (ppt) N/A

Larval Food Preference N/A

Habitat where Juveniles are found N/A

Length when Juvenile Settles out (cm) N/A

Temperature for Juvenile Survival (°C) N/A

Salinity for Juvenile Survival (ppt) N/A

Where and When Juvenile Feeds N/A

Juvenile Food Preference N/A

Habitat where Adults are found (depth in meters) N/A

Temperature for Adult Survival (°C) N/A

Salinity for Adult Survival (ppt) N/A

Adult Feeding Type N/A

Adult Food Preference N/A

Food Eaten in Laboratory Setting N/A

Amount of Food Eaten in Laboratory Setting N/A

Additional Laboratory Findings N/A

Environmental Considerations N/A

Commercial Fishery N/A

Market Eaten raw or fried (Haderlie and Abbott in Morris et al. 1980)
Adductor mussel of this species is eaten (O'Clair and O'Clair 1998)

Sold Fresh or Frozen Fresh (Haderlie and Abbott in Morris et al. 1980)

Style Species is Sold N/A

Additional Use of the Species N/A

Shelf-life in Fresh State (days at 40°F) N/A

Shelf-life in Frozen State (months at 0°F) N/A

Shelf-life Canned (months) N/A

Weight sold in Oregon (kg) N/A

Ornamental Market N/A

Parasites or Disease N/A

Additional Remarks N/A

Location where Species has been Researched/Farmed N/A

Appropriate Aquaculture Systems N/A

Recent Wild Harvest Data for Oregon
Data from the Oregon Department of Fish and Wildlife

Year Total Catch
(Pounds) Ex-vessel Value
( U.S. Dollars)

1989
220

10

1990
24

1

1991
0

0

1992
29

203

1993
0

0

1994
126

88

1995
20

10

1996
0

0

1997
0

0

1998
23

6

Home Species Profiles Top Food Species Top Ornamental Species Additional Information References Contacts

Alternate Common Names	Purple-hinged Rock Scallop, Giant Rock Scallop (O'Clair and O'Clair 1998)
U.S. Range in the Pacific Ocean	Common British Columbia to Baja (Haderlie and Abbott in Morris et al. 1980)
Habitat	Rock crevice, pilings, floats (Haderlie and Abbott in Morris et al. 1980)
Substrate	N/A
Depth range (meters)	Intertidal to 50 (Haderlie and Abbott in Morris et al. 1980)
Behavior	Can swim as a juvenile (Anderson 2001) Once 2.5 cm in diameter individuals cement self to rock (Haderlie and Abbott in Morris et al. 1980)
General Temperature Range (°C)	N/A
General Salinity Range (ppt)	N/A
Maximum Overall Recorded Size (cm)	N/A
Maximum Recorded Size for Males (cm)	N/A
Maximum Recorded Size for Females (cm)	N/A
Average Maximum Overall Length (cm)	Up to 30 (diameter) (Anderson 2001) 25 (diameter) in subtidal area 15 (diameter) in intertidal area (Haderlie and Abbott in Morris et al. 1980)
Average Maximum Overall Length for Males (cm)	N/A
Average Maximum Overall Length for Females (cm)	Females are larger than males (O'Clair and O'Clair 1998)
Average Maximum weight (kg)	N/A
Average Maximum weight for Males (cm)	N/A
Average Maximum weight for Females (cm)	N/A
Length When Harvested (cm)	N/A
Weight When Harvested (kg)	N/A
Overall Length to Age Ratio (cm/age in years)	N/A
Male Length to Age Ratio (cm/age in years)	N/A
Female Length to Age Ratio (cm/age in years)	N/A
Overall Maximum Age (years)	25 (Haderlie and Abbott in Morris et al. 1980)
Maximum Age for Males (years)	N/A
Maximum Age for Females (years)	N/A
Age when Harvested (years)	N/A
Overall Growth Rate	N/A
Male Growth Rate	N/A
Female Growth Rate	N/A
Overall Age at Maturity (years)	N/A
Male Age at Maturity (years)	N/A
Female Age at Maturity (years)	N/A
Overall Length at Maturity (cm)	N/A
Male Length at Maturity (cm)	N/A
Female Length at Maturity (cm)	N/A
Maturity/Temperature Relationship	N/A
Type of Reproduction	Protandrous hermaphrodites (O'Clair and O'Clair 1998)
Fecundity	N/A
Spawning Habitat	N/A
Spawning Behavior	N/A
Time of Year of Spawning	April (California) (Haderlie and Abbott in Morris et al. 1980) Mid-May–mid-June (Puget Sound) (O'Clair and O'Clair 1998)
Number of Spawns per season	N/A
Spawning/Temperature Relationship (°C)	N/A
Spawning/Salinity Relationship	N/A
Description of Eggs	N/A
Habitat where Eggs are found	N/A
Days to Hatch	N/A
Time of Year when Eggs Hatch	N/A
Temperature for Egg Survival (°C)	N/A
Salinity for Egg Survival (ppt)	N/A
Predators on Eggs	N/A
Habitat where Larvae are found	Planktonic (O'Clair and O'Clair 1998)
Days in Larval Stage	60 (O'Clair and O'Clair 1998)
Temperature for Larval Survival (°C)	N/A
Salinity for Larval Survival (ppt)	N/A
Larval Food Preference	N/A
Habitat where Juveniles are found	N/A
Length when Juvenile Settles out (cm)	N/A
Temperature for Juvenile Survival (°C)	N/A
Salinity for Juvenile Survival (ppt)	N/A
Where and When Juvenile Feeds	N/A
Juvenile Food Preference	N/A
Habitat where Adults are found (depth in meters)	N/A
Temperature for Adult Survival (°C)	N/A
Salinity for Adult Survival (ppt)	N/A
Adult Feeding Type	N/A
Adult Food Preference	N/A
Food Eaten in Laboratory Setting	N/A
Amount of Food Eaten in Laboratory Setting	N/A
Additional Laboratory Findings	N/A
Environmental Considerations	N/A
Commercial Fishery	N/A
Market	Eaten raw or fried (Haderlie and Abbott in Morris et al. 1980) Adductor mussel of this species is eaten (O'Clair and O'Clair 1998)
Sold Fresh or Frozen	Fresh (Haderlie and Abbott in Morris et al. 1980)
Style Species is Sold	N/A
Additional Use of the Species	N/A
Shelf-life in Fresh State (days at 40°F)	N/A
Shelf-life in Frozen State (months at 0°F)	N/A
Shelf-life Canned (months)	N/A
Weight sold in Oregon (kg)	N/A
Ornamental Market	N/A
Parasites or Disease	N/A
Additional Remarks	N/A
Location where Species has been Researched/Farmed	N/A
Appropriate Aquaculture Systems	N/A

Year	Total Catch (Pounds)	Ex-vessel Value ( U.S. Dollars)
1989	220	10
1990	24	1
1991	0	0
1992	29	203
1993	0	0
1994	126	88
1995	20	10
1996	0	0
1997	0	0
1998	23	6