Atlantic Canada is home to weird and wonderful creatures of the deep

The ocean is full of weird and wonderful creatures. Here are a few that frequent Atlantic Canada that you may not know about.

Masters of disguise

As if being highly intelligent masters of escape and disguise weren't enough to make this list, octopuses come in a variety of strange forms and colours.

Octopuses are in the taxonomic class of cephalopods, a word that translates to "head-foot".

Most octopuses die shortly after incubating their egg clutch, except for a tea-cup sized octopus called Bathypolypus arcticus, which frequents waters off Nova Scotia.

"They're distinguished by having possibly one of the longest egg-incubation periods of almost any species," said Chris Harvey-Clark, a marine biologist at Halifax's Dalhousie University.

Once they lay their eggs, Bathypolypus guards them until they hatch, which could take nearly three years.

"[That's] exceptional for any species," said Harvey-Clark.

Cannibalistic 'true Canadian shark'

The Greenland sharkeats its own kind, lives at depths of 4,000 metres and can grow to nearly seven metres in length.

Perhaps most interesting is the recent discovery thatthese giants of the deep may live 400 years or longer and only reach puberty around the age of 150.

"They are the most enigmatic of the sharks in our water," said Boris Worm,a Dalhousie University ecologist.

"They are the oldest living vertebrate that we know of on our planet. To translate that, they are about five times as old as your grandmother and that's just stunning to me."

These beasts are occasionally captured as bycatchby Atlantic Canadian fishermen.

"I call them the true Canadian shark because they are cold-loving and as far as we know they're only found in Arctic and adjacent waters," said Worm.

• Meet the 'tremendous cannibals' who hit puberty on their 150th birthday

Beautiful creature,ugly name

Althoughtheir name is not appealing, sea slugs or nudibranchsare some of the most beautiful creatures in the ocean. Harvey-Clark saysthere are 50 to 60 species found in waters off Atlantic Canada.

Glaucusatlanticus, or blue angel, isan open-ocean species that prefers warmer climates but sometimes makes its way here off eddies on the Gulf Stream.

The nudibranchswims upsidedown, preying on the venomous jellyfish-likePortugueseman o'war. The Glaucusis not affected by the man o' war's venom and actually incorporates it into its own tissue as defence, giving predators, or unwitting humans, a nasty sting.

• Sea slug's disposable penis regenerates in 24 hours

Mouth like alien worm from Star Wars

With a mouth resembling thesarlaccin the Great Pit ofCarkoon(that mouth in the desertin Return of the Jedi), the gargantuan leatherback turtle is an obvious entry onthis list.

Leatherbackshave remained virtually unchanged since before the days of the dinosaurs, swimming the world's oceans for more than 90 million years.

The world's largest reptile, leatherback turtles can reach more than two metres in length and weigh more than 900 kilograms. They're known to swimup to 12,000 kilometres ayear and diveto depths of up to 1.2 kilometres.

Creature with glowing green eyes

Lurking in the depths of the ocean is acreature with neon green eyes, along pointy snout and ribbed fins resembling feathered wings.

Longnosechimeras and all other chimerasare a group of cartilaginous fish that branched off from sharks nearly 400 million years ago, according to the California Academy of Sciences.

JeffHutchings, a fisheries scientist and professor at Dalhousie University, said in the1990sa Dalhousie technician went out on a DFO research survey and caught a fish no one had seen before.

At that time, only four had been recorded being caught.

"They're deep-sea, very infrequent and they certainly come close to asea-monster-ouslike fish," saidHutchings.

Whale? Shark? What the heck is it?

If you ever see a giant, strange-looking fish flopping around at the ocean's surface, there's a good chance you're looking at an ocean sunfish.

The flat, peculiar-looking fish can weigh as much as 1,000 kilograms and are the largest bonyfish in the world. They're also one of the most recently evolved fish.

"They probably produce the greatest number of eggs per female of any fish like several hundred million at a time," saidHutchings.

They spend much of their life in the dark part of the ocean below 200metres, but they are often seen basking at the surface where they are sometimes mistaken for sharks.

Male is a parasite, literally

There are somecreatures that lurkin the darkest depths of the ocean that use glowing, bioluminescentbacteria-filledlures to draw in prey.

Angler fish are found in oceans around the world and a few species are found in Canadian waters. Most familiar to Nova Scotians is the monkfish sold in fish shops and grocery stores.

One of their weirdestfeatures is the relationship between males and females. Males are a tenth the size of the female, living their whole life attached to herand feeding off her blood and fluids.

"Females, it turns out, have to have these little parasitic males otherwise they won't mature," Hutchingssaid.

1 shocking fish

Atlantic torpedo ray

8 years ago

Duration 0:41

The torpedo ray has powerful electric organs that can put out a shock of about 200 volts.

Imagine a fish that can reach five feet indiameter, withcamouflagethat makes it blend inwith the sea floor and can release an electric charge of 600 volts those are attributes that make torpedo rays unique.

"The most interesting weird and wonderful creature we're playing with is the Atlantic torpedo ray," saysFredWhoriskey, executivedirectorofthe Ocean Tracking Network atDalhousie University.

"It's really unique in that it has modified the muscles in its wings to become electric organs. Those electric organs are used to put out a massive electric discharge on the order of about 600 volts and it stuns its prey and it swallows them whole."

Little is known about the torpedo ray, the only electric fish known in the North Atlantic Ocean.

The rays are here during the summer and scientists have begun tagging them to understand more about them as long as they don't short out the electronic tags.

A gardening bath pouf

Where does a gardening, single-celled organism about the size of a grapefruit fit in the tree of life? That's a question scientists arestrugglingwith.

Little is known about xenophyophores, says Ellen Kenchington, a Department of Fisheries and Oceans researcher at the Bedford Institute of Oceanography who specializes in benthicecology, which focuses on the lowest level of the water.

A xenophyphore looks like a bath pouf and one scientific paper suggests they actually garden on the sea floor.

'"They're just so cool," she said.

The strange and fragile creatures put out a trail of slime as they slowly make their way across the seafloor. They then turn around and eat that slime trail and all the organic bits that have grown on it.

Kenchington says there are about 30,000 of them per kilometre in Sable Gully, off the coast of Nova Scotia,but because they fall apart if you try to bring them to the surface, they're only observed when remotely operated vehicles are sent down.

• Deep-sea biodiversity map finds surprising varieties of life