Sprinkled throughout the ocean ground, invisible from the floor, are a whole bunch — or possibly 1000’s — of sink holes. These “blue holes,” as scientists name them, don’t swallow up the whole lot incapable of preventing their gravitational pressure, like their black hole cousins. However to those that examine them, they’re nonetheless almost as intriguing.

This week, one explicit blue gap — the Inexperienced Banana — has captured the creativeness of many a land dweller. Headline after headline has supplied a variation on the same theme: Scientists are flocking to a mysterious blue gap. One publication requested:“What May It Be?”

What it is is the Inexperienced Banana, one of many deepest blue holes ever found, in accordance with Jim Culter, a senior scientist at Mote Marine Laboratory, and it’s on the verge of being studied in essentially the most complete method but.

Scientists will enterprise into the Inexperienced Banana’s depths subsequent month, the place they hope to reply longstanding questions on whether or not the sink gap — which extends round 275 ft, like an inverted, hourglass-shaped 20-story constructing, anchored within the ocean ground — connects to different sink holes and whether or not freshwater flows inside.

The scientists main the mission to the sink gap, which begins 155 ft beneath the ocean’s floor round 50 miles offshore from St. Petersburg, agree that the title, the Inexperienced Banana, sounds prefer it needs to be a bar in Key West. In line with Larry Borden, a longtime industrial fisherman and boat captain who has recognized in regards to the Inexperienced Banana for many years, the title emerged within the mid 1970s after a ship captain noticed a inexperienced banana pores and skin floating by a recognized “spring,” as fishermen referred to the underwater sink holes again then.

They had been referred to as springs, Mr. Borden stated he had heard, as a result of within the 1530s, when the Spanish explorer Hernando de Soto was hanging out within the space, there was recent water streaming out of the holes. Spear fishermen who gathered close to the holes centuries later, together with Mr. Borden, puzzled how deep they had been.

Ultimately, Mr. Borden instructed a diver pal, Curt Bowen, in regards to the Inexperienced Banana, and in 1993, Mr. Bowen grew to become one of many first individuals to dive to the underside and to map the blue gap. An article in Advanced Diver Magazine, which Mr. Bowen owns, posited that there have been so many sink holes on the ground of that Gulf of Mexico that if it had been attainable to empty it, “it will most likely appear to be Swiss cheese.”

Almost 30 years later, scientists nonetheless don’t know simply how porous it’s. Mr. Culter stated that scientists have verified about 20 underwater sink holes on the West coast of Florida alone, however there are most likely twice that quantity. A part of what makes them onerous to depend can also be what makes them so intriguing, stated Emily Corridor, a scientist at Mote Marine Laboratory main the mission: They’re troublesome to identify from above.

“You’re in the course of the Gulf of Mexico and also you don’t see something throughout,” Dr. Corridor stated. After which after diving for fairly a while, “This gap opens up, and it’s booming with life.”

There appears to be one thing in regards to the uncommon seawater chemistry in blue holes that’s significantly good at facilitating life. Swimming pools of fish, oodles of sponges and an array of vegetation are widespread inside these “oases,” as Dr. Corridor calls them. The water inside can also be typically atypically clear, which is a part of why they’re beloved by divers.

One motive that so little is understood about them, in accordance with the National Oceanic and Atmospheric Administration, is that their entry factors are sometimes slender — earlier than they broaden out — making it inconceivable for an automatic submersible to enter.

In subsequent month’s mission, which NOAA is funding, the plan is to fastidiously decrease a 600-pound lander inside. Collectively the lander, which is formed like a triangular prism, and divers will gather water and sediment samples and full a organic survey, Dr. Corridor stated.

“The joy comes from the concept that is exploration — we don’t know what we’ll see down there biologically and chemically,” she stated. “We have now an thought. However each time we go down there we discover one thing new.”

The workforce lately explored a close-by blue gap, round 350 ft deep, often called “Amberjack.” They had been shocked to find two lifeless smalltooth sawfish, an endangered species, on the backside.