Gray Whales & Dana Point, California
Experts report that the gray whale uses the Dana Point Headlands, 200-foot cliffs near the harbor, as a landmark to check their migration path.
Approximately 25 percent of the gray whale population follow the coastline during migration. That means during peak season (December – March) 40 – 50 whales pass by Dana Point each day.
Migration
Gray whales migrate once a year leaving Alaska in October and arriving in Mexico to give birth or mate.
The gray whale undertakes the longest migration by any mammal each year – traveling more than 6,000 miles in each direction. That’s more than half their lives in transit – typical of our Southern California lifestyle!
The whales travel up to 100 miles per day, taking eight to 10 weeks to migrate. If humans traveled the same distance (as the whale swims) in a car, it would take four full days, driving 60 miles per hour, 24 hours per day.
The whales make their return trip from February through July.^top
Vital Stats
Birth length
12 to 15 feet long -
Babies can grow up to a foot per week for the first few months. After two months they are 25 feet long.
Average length
45 feet (about the size of a bus)
Weight
35 tons (more than twice the weight of a bus)
Life span
50 to 60 years
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Behavior
Spouting
When a whale surfaces to breathe, it shoots up a three-to-four foot spout
of air, condensed water and sea water.
Sounding
After taking several shorter dives, whales often take a deeper dive, also
known as sounding. Their tale, or fluke, rises entirely out of the water as they dive.
Spyhopping
In order to scan their surroundings, whales often lift their entire head out of
the water.
Breaching
Whales sometimes throw up to three-quarters of their body out of the
water. Some scientists believe it is to communicate, others think it is to play.
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History
The California Gray Whale has migrated along the coast for thousands of years.
Though hunted to near extinction in the mid-1800s and again in the 1920s, the gray has grown to a population of 24,000, making it the world’s only endangered whale that has ever reproduced back to a safe number.
The gray whale was removed from the endangered species list on June 16, 1994. ^top
Food
The gray whale does not have teeth. Baleen plates trap food while dirt and water are spit out between the plates. Often times, gray whales simply place the right side of their head on the ocean floor and suck in the top sediment layer to eat.
A mother gray whale pumps 50 gallons of milk a day into her infant’s mouth. Approximately 53-percent butterfat, the milk allows the calf to gain about three pounds an hour. Human milk is roughly only two-percent butterfat.
Gray whales mainly snack around the clock on amphipods (tiny organisms that live in the muddy ocean floor) during the summer months, gaining up to a ton in a season. ^top