Marine Mammals

These beautiful Pacific white-sided dolphins are native to the Bay Area! They get up to 8 feet weighing in at a whopping 300-400 pounds! They like to snack on small squid and fish such as anchovies, herring, and sardines. They prefer large herds of 100 and try to stay out of the way of big predators such as killer whales and sharks.

Pacific White-Sided Dolphin

These black and silver harbor porpoises are on the smaller side, weighing in at 5 feet and 120 pounds. They prefer smaller fish as their meals, all the while watching out for sharks, killer whales, and even grey seals. They prefer to act alone as lone wolves, leaving to socialization to other marine mammals.

Harbor Porpoise

The Dall’s porpoise is a social being, as well as a big one. They grow to around 7.5 feet long and weigh up to 500 pounds. They eat small fish and cephalopods (a type of mollusk) and are hunted by killer whales and sharks. In their pass time, they like to hitch rides on the waves left from passing boats!

Dall's Porpoise

Great White Sharks are the apex predator of the bay! These large mammals grow up to 21 feet long, weighing as much as 2,400 pounds. They eat large fish, with no competition from any predators. They have hundreds of teeth and will lose and gain many in their lifetimes.

Great White Shark

These northern elephant seals can be anywhere from 880-5,000 pounds, depending on their gender. They eat anything from shark, flatfish, crab, squid, and octopus! While they may be large, they have to be on the lookout for great white sharks and killer whales. They can escape by swimming up to a mile below the surface!

Northern Elephant Seal

Adorable harbor seals are usually around 6 feet and 290 pounds, preferring, you guessed it, harbors as their primary habitat! They eat larger fish such as salmon and sea bass, as well as squid, shrimp, and crab. They need to watch out for sharks and killer whales on occasion, but most importantly motorboats.  

Harbor Seal

These adorable Northern Fur Seals are excellent examples of sexual dimorphism, which is when the two sexes exhibit vast differences in their characteristics, such as size. The males can get up to 7 feet long weighing 600 pounds when females are up to 5 feet and 130 pounds. They swallow (not chew!) animals such as squid, octopus, and fish, and are in fierce competition with killer whales and sharks. Watch out; these seals are incredibly territorial!

Northern Fur Seal

These massive sea lions get up to 2,470 pounds and 10 feet long. They eat everything from herring, pollock, salmon, cod and rockfishes, sculpin, Atka mackerel, capelin, to squid and shrimp. Repercussions due to their eating habits lead these creatures to become federally endangered since 1990.

Sea Lion

These majestic humpback whales can grow to 52 feet long, eating krill and small fish to survive. They are on the lookout for orcas and sharks as they swim through the bay. They are critical animals in regulating the flow of food in the food chain. Did you know that the shape and color pattern on the humpback whale’s dorsal fin and flukes are unique to each one, like fingerprints!

Humpback Whale

These massive blue whales are the largest animal ever to be recorded, at a whopping 150 tons and averaging 90 feet long! They eat mostly krill and steer clear of killer whale pods. They help our ecosystem by helping recycle nutrients in the water!

Blue Whale

These Gray Whales can be 50 feet long, and up to 36 tons! They mostly eat amphipods which are tiny organisms. Even though they are so big, they still need to watch out for killer whales and sharks!

Gray Whale