Here at Adventure Aquarium, one of our most unique animals is the great hammerhead shark, which is in fact, the only one on exhibit in the entire country!
As you can guess, he gets a lot of attention from visitors and biologists alike. Our husbandry team takes great care to ensure that the hammerhead, along with the other fish, sea turtles, sharks and rays in our 760,000 gallon Ocean Realm (the hammerhead’s home), is well cared for; and, one of the important factors in maintaining the great hammerhead shark’s health is making sure he is well-nourished.
The great hammerhead is fed six times a week, with a varied diet that consists of mackerel, herring, squid, blue fish, among other species. During each feed, he is fed around 2% of his body weight, which measures out to 900 – 1,000 grams of food. Due to the large amount of fish we feed the animals each day, the fish come to the aquarium frozen. When the fish is frozen, it loses some of its nutritional value. Therefore, our biologists will put a vitamin supplement inside the fish before feeding the sharks once a week, with our hammerhead receiving four and a half vitamins each feed.
Before even going to Ocean Realm to feed the great hammerhead, the biologists first get the vitamins and “fish of the day” to feed the shark. Once at Ocean Realm, there’s a specific procedure for feeding. First, the biologist will prepare the pole used to feed the sharks. The feed pole is around 12 feet long and has short, skinny prongs that stick out laterally at the bottom where the food is placed. Then, the biologist weighs one fish and records the weight on a form before sticking it on the pole. The biologist then taps the water with the pole, which signifies to the great hammerhead shark that it’s time for feeding! This procedure is repeated until the shark becomes full or he has eaten his entire meal.
Doesn’t seem too hard right? Well, sometimes competition can arise, even from our loggerhead sea turtles! The biologists work around this by having turtle-favorite treats like lettuce and veggies in case curiosity gets the better of the hammerhead’s shelled neighbors!
So what happens during a great hammerhead feed and what does it look like? Well, check out the exclusive video below!