Recently, the Monterey Bay Aquarium's giant octopus exhibit has been looking a little like a preschool play session. Several days a week, aquarist Adam Frantz has been challenging the two, 11-pound octopuses with balls, jars with hidden treats inside, and plastic mazes. It’s all part of the Aquarium’s “enrichment program” for these inquisitive and intelligent animals.
In the same way we might challenge ourselves with a game of Scrabble or a crossword puzzle, aquarists routinely present exhibit animals with new surroundings and social situations. It helps keep everyone—animals and aquarists alike—healthy, happy, and stimulated.
“I’ve been having fun creating these puzzles,” says Frantz. Behind the scenes, he has a basket of balls, jars, plastic toys and relics of past experiments that imply just one thing: fun. “Enrichments have to be approved by the Aquarium. But other than that, it’s up to your own creativity.”
Having a Ball
Frantz starts by presenting the octopuses with an orange ball at feeding time. Called “target training,” this helps create a simple association with something positive. Next, he places food inside the ball, which the octopus easily retrieves with one of its long arms. Once this is mastered, Frantz offers a
screw-top plastic jar containing a tasty shrimp. Within a few minutes, the lid is unscrewed and the shrimp is consumed.
Games are not the only things that constitute an enrichment for the octopuses. The main objective is a change in environment, and this can include moving rocks or plants, or even adding other animals. Recently, Frantz placed several small rockfish in the exhibit for just this reason.
The octopuses seem to welcome all these changes enthusiastically. As of late, when Frantz does something as simple as clean the windows, an octopus will come right over and wrap itself around the cleaning pad or even crawl up his arm. Octopuses have been known to get quite “attached” to their aquarists, and it’s not uncommon for Frantz to end up with an octopus “hickey” or two after a day’s work.
The Prey Maze
Now the Aquarium’s octopuses are trying to crack the biggest puzzle of all: a “prey maze,” which Frantz constructed from an old water filter housing. To solve this challenge, the octopus must extend an arm through serpentine passages to retrieve a shrimp or live crab at the far corner of the maze. (Recently, an octopus at the New England Aquarium found itself a little “boxed in” by a similar enrichment.)
One octopus has already mastered a simplified version of the maze. Given these remarkable animals’ intelligence, it seems likely they’ll solve the more complex version as well. But if it takes a while, that’s just fine with Frantz. The octopuses may not master all of his puzzles—but that’s the whole idea.
“It’s good for the animal,” says Frantz of his enrichment games, “and it’s fun for me.”
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