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Rhinoptera Bonasus
- large ray found along eastern coast of North America
Rajidae
- bottom-dwelling tropical rays: skates
Raja
- type genus of the family Rajidae
- a prince or king in India
Raja Batis
- common European skate used as food
Raja Erinacea
- most plentiful skate in North American inshore waters in summer; to 21 inches
Raja Radiata
- cold-water bottom fish with spines on the back; to 40 inches
Raja Laevis
- one of the largest skates (to 5 feet); an active skate easy to hook
Ratite
- flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
Ratites
- flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds