The six-and-a-half foot tall, 530-pound aluminum suit looks like something out of an action movie. In reality it has an entirely different — and more intriguing — purpose. Come this summer, scientists will be using the suit, known as the Exosuit, to dive up to 1,000 feet into the ocean with the aim of collecting and studying bioluminescent fish. At such extreme depths, despite almost no visible light, a bounty of mysterious, glowing fish thrive. And with the Exosuit, scientists will observe these fish like never before.