The Ruthless Phronima, and Other Hidden Wonders of the Sea

The Ruthless Phronima, and Other Hidden Wonders of the Sea

For those who prefer beauty to horror, vast blue whales circle a wall screen in full-size video animations. And if you like weird and appealing, the Mola mola, or ocean sunfish, makes a similar appearance.

Yet, as this show proves, there is always more to discover. Anyone who loves the water knows the thrill of breaking the surface to enter a different world. And snorkeling or scuba diving reveals all sorts of life that reacts to you with near indifference. If you dive at night, for instance, and shine a light on a reef, there are stunning displays of fluorescence.


A partial replica of a Triton submersible is one of the show’s interactive features.

Denis Finnin/American Museum of Natural History

And if you go to great depths you find even more. Scientists like John Sparks, who curated the exhibition, are now finding that these phenomena are even more common than originally thought. One section focuses on fluorescence, found so far in more than 200 species of fish. Even sea turtles display it. Here, there are live animals showing off their colors — eels, scorpion fish, pipefish, green-patterned chain catsharks and red seahorses.

Older children can sit in a model submersible, or play a kind of video game in which they drive the submarine around the ocean floor. And younger ones can actually reshape that floor in a sandbox lit to make some of the sand seem beneath the ocean surface. You can raise islands or destroy them.

Some of the technical leaps that allow investigation of the oceans are high tech, like the submersibles, spheres with large acrylic windows in which you can dive thousands of feet deep. Advances in sonar and lasers allow scientists to better map the ocean floor, the details of which are largely unknown and unexplored.

Parts of the ocean are so remote it is hard to imagine them. The Pacific’s Mariana Trench, the deepest part of any ocean, is in the hadal zone (for Hades, the underworld). The deepest part of the trench, seven miles down, is called the Challenger Deep. Only three humans have visited it, fewer than have been to the Moon.


Not just playing with sand: Visitors of all ages can dig trenches and create islands at the ocean topography table.

Denis Finnin/American Museum of Natural History

The ocean that is glimpsed in this show is largely still to be explored, but, as the exhibit notes at the end, it is threatened in many ways by climate change and other environmental insults. The ocean is becoming more acidic, which threatens some plankton. Warmer seas and acidity are implicated in killing the algae that live with corals, creating bleached, dead reefs. Overfishing threatens many species. All the more reason to learn as much as possible about the oceans now.

Although I am usually partial to biological wonders, my favorite part of this exhibit was the technology under development, such as the soft fingerlike grippers that researchers are developing so scientists in a submersible or remotely operating one can take hold of objects and living things without damaging them. This particular project is a joint effort of Harvard and the City University of New York. The group that does this work is called the Squishy Finger/Soft Robotics for Delicate Deep-sea Marine Biological Interactions team. The title itself is an unseen wonder.

My favorite story of technological innovation in the exhibition involves attaching tags to sea creatures to track their movements. Attaching such tags always presents challenges, like how to get them to stick and not interfere with water flow as a whale swims.

But what about tagging a jellyfish? Researchers tried quite a few different ways to stick a tag on amorphous, fragile jelly. The solution was an inexpensive glue that veterinarians use to help small cuts on animals heal. According to the show, the battery for such a tag is “now the size of a piece of Trident gum.”

Of course, I have to say that I really liked sitting in the model submersible and playing the submersible video game too. It’s a good thing my children are older now. It would be bad enough to have my kids be the ones to tell me to put my shoes on. How embarrassing if a museum official had to order me to give the kids a turn.

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