Deep Sea Cucumber: “jettisons internal organs from anus”

Unbelievable – nature’s defense strategies never cease to amaze…

Photo by INDEX-SATAL/NOAA

“A free-swimming sea cucumber moves through the freezing waters of a 10,515-foot (3,205-meter) abyss.

The 1,250 known species of sea cucumbers—named for their distinctive shapes—live on or near deep ocean floors or dwell in the shallows. (Watch a video of a “hairy” sea cucumber.)

When threatened, some sea cucumbers can mutilate their own bodies as a defense mechanism: The animals violently contract their muscles and jettison some of their internal organs out of their anuses.”

From National Geographic New Deep Sea picture gallery

Indonesia mimic octopus imitates toxic flatfish for defense

How about this for an impersonation… Watch video of the Indonesian Mimic Octopus impersonating a toxic flatfish – sometimes the best form of defense really is to attack!

The Indonesian mimic octopus has the extraordinary ability to pass itself off as many of the toxic fishes or sea snakes that share its habitat.

Instead of blending into the background, the animal impersonator often uses a daredevil strategy of making itself more conspicuous to predators. Scientists believe the behaviour evolved to scare other animals.

By flattening its head and arms, using a bold brown and white colour display and adopting an undulating swimming technique T. mimicus can fool predators that it is, in fact, a poisonous flatfish rather than a tasty meal.

From the BBC. Watch full video HERE.

Flight of the Whale sharks

Monster sharks can execute underwater “flight” moves that would have put some fighter pilots to shame, two researchers announced this week.

Normally seen cruising slowly at the surface, the whale shark, which does not harm humans, can transform in the deep, hurling itself into a swift, steep dive like a pilot, soaring up and then down again in a series of great bounds, said researcher Rory Wilson of Swansea University in the Wales.

“It is like the way a bird dives, then soars, using its momentum and gravity to conserve as much energy as possible. It flies like a bird but in this case, a bird as large as a bus!” Wilson said. Such behavior has never been observed in a fish before, he said.

“For the first time, we have an insight into what it is that these magnificent creatures get up to when they are out of sight of humans and it isn’t what we expected”

From Livescience.com: Read more

Arctic ‘Monster’, the Greenland Shark

Canadian fish scientists are opening a window into the mysterious world of the Greenland shark — the top predator in the Canadian Arctic about which almost nothing is known. Except this, says Steve Campana of the Bedford Institute of Oceanography: “These are very, very strange sharks.”

Its meat is poison. Its mouth is far under its body. It has almost no spine. It’s so lethargic that it doesn’t even snap at the scientists who hook it and attach a radio to it.

And it may live 200 years.

“The sharks are incredibly abundant”, says Mr. Campana, “and yet we don’t have a clue how fast they grow, how old they get, where they give birth, how many they give birth to…” The researchers are hoping that samples of bone may hint at the age, using the 1960’s testing of nuclear weapons and searching for radioactive elements.

Growing to a length of eight metres, it cruises along the bottom of the ocean floor taking it’s meals of fish and seals. It’s not known if the seals are already dead when they consume them or if curious young ones have ventured too close to the slow moving shark, no one really knows. The Canadian researchers have tagged the sharks and will record data and then will ‘pop off’ the sharks in a few months and be radio their findings via satellite.

Only one other big shark in the world is almost unknown — the extremely rare deep-ocean “megamouth.”

From DiveNews: Read more