("COSEWIC Assessment and Status Report on the Grey Whale Eschrichtius robustus Eastern North Pacific Population in Canada", 2004; Jones, et al., 1984; Rice, et al., 1984; Sumich and Harvey, 1986), Gray whales prefer to stay close to shore. Killer Whales Attack and Eat a Gray Whale. Observed and Maximum Rates of Increase in Gray Whales, Eschrichtius robustus. JAMES F. FISH, JAMES L. SUMICH, GEORGE L. LINGLE, Aerial Observations of Gray Whales During 1973, Ballistocardiography as a Technique for Comparative Physiology, Some Hematologic Observations on the California Gray Whale, Surgical Attachment of a Telemetry Device to the Dorsal Ridge of a Yearling California Gray Whale, Eschrichtius robustus, Respiration and Metabolism in Two Baleen Whale Calves, Aerial Observations of Migrating Gray Whales, Eschrichtius robustus, off Southern California, 1969-72, Feeding of a Captive Gray Whale, Eschrichtius robustus, Capture and Harnessing of Young California Gray Whales, Eschrichtius robustus, Some Coagulation Factors in Plasma from a California Gray Whale, Eschrichtius robustus, A Note on Gray Whale Behavioral Interactions with Other Marine Mammals, Some Physiological Parameters of the Blood of the California Gray Whale, Telemetering of Temperature and Depth Data From a Free Ranging Yearling California Gray Whale, Eschrichtius robustus, Fluorescent Karyotype of the California Gray Whale, Investigation of Blubber Thickness in a Gray Whale Using Ultrasonography. The … ("COSEWIC Assessment and Status Report on the Grey Whale Eschrichtius robustus Eastern North Pacific Population in Canada", 2004; "Observed and Maximum Rates of Increase in Gray Whales, Eschrichtius robustus", 1984; "U.S. Gray whales also eat herring eggs and spawn (Clupea pallasii) along their coastal migration routes and are considered to be opportunistic feeders that also feed upon schools of small baitfish. Accessed ("COSEWIC Assessment and Status Report on the Grey Whale Eschrichtius robustus Eastern North Pacific Population in Canada", 2004; "Eschrichtius robustus, Gray Whale", 1998; Jones, et al., 1984), Gray whales have mottled gray backs, a trait shared among several mysticete species. Fish and Wildlife Service - Species Profile (Gray Whale, Eschrichtius robustus)", 1994; Bryant, 1995; Clapham, et al., 1999; Jones, et al., 1984; Reilly, et al., 2008). They feed in shallow water with muddy or sandy bottoms or in kelp beds. Accessed About 75% of first-year mortalities occur during the first 2 weeks after birth. Accessed December 02, 2020 at https://animaldiversity.org/accounts/Eschrichtius_robustus/. Order Cetacea: Cetaceans (*=Species most likely to be seen) Eschrichtiidae: Gray Whale. Flippers are short and broad. During fall, eastern gray whales migrate along the west coast of North America and spend winter in waters of less than 4 m in depth. Reilly, S., J. Bannister, P. Best, M. Brown, R. Brownell Jr., D. Butterworth,, P. Clapham, J. Cooke, G. Donovan, J. Proportions of sounds used, parameters of each sound class, and rates of sounds were compared among social contexts. The Gray Whale: Eschrichtius robustus. offspring are produced in more than one group (litters, clutches, etc.) ("COSEWIC Assessment and Status Report on the Grey Whale Eschrichtius robustus Eastern North Pacific Population in Canada", 2004; Sund, 1975), Sexual maturation in gray whales occurs around 8 years of age, but has been documented in individuals as young as 5 and as old as 11. Bottom habitats in the very deepest oceans (below 9000 m) are sometimes referred to as the abyssal zone.