today's video was requested by Marvin if you have any other topics you'd like to
learn about subscribe and let us know in the comments section below number eight
the Japanese spider crab this massive crowd has the largest leg span of any
arthropod which can reach the impressive and scary length of 18 feet from claw to
claw this is particularly peculiar as his carapace grows only to be around 16
inches wide its weight is massive as well compared to other underwater
arthropods with some adults reaching an impressive size of 42 pounds they're
imposing exoskeleton is not only used to protect themselves from their natural
predators which include octopus and certain types of sharks but also to
effectively camouflage itself within his surroundings having a bumpy shell allows
it to blend perfectly with the ocean floor making it appear is just another
rock laying around to make the illusion even more uncanny the crab adorns itself
with sponges and marine flowers which means if you ever bump into it you'll
never see it or it's freakishly long legs coming number 7 the giant isopod
the bath enormous giganteus more commonly known as giant isopod is
basically the equivalent of the earthbound woodlouse just a lot more
disgusting and massively larger luckily for us it mainly called the sea
surrounding the Yucatan Peninsula home near the coast of Mexico and only at
depths of 1177 feet or deeper we truly hope we never find them anywhere else
because these creatures are truly freaky the giant isopod look like creepy little
monsters measuring up to 14 inches they tend to feed on fish remains they find
floating around the ocean fluor interestingly enough they can't
even be starved to death as they've been known to fast for a period as long as
five years at a time while they're waiting to scavenge for their next meal
they'll hide in the mud and wait patiently for a larger predator to leave
parts of their victim behind like the little vultures they are luckily they're
hiding deep enough that you'll never unwittingly run into them during your
next diving adventure before we move on answer this quiz question as the first
land animals on earth how long ago were arthropods believed to have evolved was
it a five thousand years ago B five hundred million years ago C fifty
billion years ago D none of the above they're not the first land animals on
earth let us know what you think in the comments section below and stay tuned to
find out the right answer number six the Antelope crab what sets this Arthropoda
apart from any other crab you might encounter to start with
they've massive antler like horns that stick out from either side of their
heads as well as incredibly long thin legs they're also known as carrier crabs
as they have the ability to keep a pair of walking legs over their shells and
utilize them as hands to move around objects and even other invertebrates
like sea urchins or corals they can be more commonly found in Australia where
most monstrous animals dwell apparently as well as in New Zealand and New
Caledonia but tend to remain in oceanic depths of five hundred and ninety feet
this is one of the blessings we can count on considering most of these
shocking underwater arthropods tend to require high hydrostatic pressure to
survive on on second thought this might be exactly what made them evolve to be
this scary number five the giant waterbug
this monstrosity looks very much like a normal land cockroach but calls lakes
and rivers its home to make them even more creepy and nausea-inducing they
also sport a pair of claws they can pinch their victims with as well as
longer antennae than the regular cockroach as they can breathe underwater
once they reach adulthood these arthropods feature breathing tubes
that easily retract into its abdomen in order to be able to remain underwater
for long periods of time they're also known as toe biters and over 170
different types of giant water bugs have been found in freshwater habitats around
the world most commonly in Africa they tend to prefer ponds and streams are
regretfully can be found outside the limits of the African territory with
some being discovered in America and Europe to a lesser extent most species
are small around 0.35 inches long though some have been known to grow as large as
point 8 inches the largest known kind much to our horror can reach the
shocking size of four and a half inches right up there with the largest
earthbound beetles ever discovered number four the water scorpion
much like our previous entry this arthropod closely resembles its land
relative in most ways but manages to be an even scarier version somehow its tail
along with the characteristic sting features respiratory tubes which when
extended above the surface of the water allows the critter to breathe normally
the only relief we might experience is that though their bite is incredibly
painful it's far less harmful than the sting its land relative can produce in
humans the water scorpion can usually be found in ponds and streams most
predominantly around Asia where locals enjoyed meals
featuring it as its main ingredient but many species have also been discovered
in America and around the globe they typically grow up to 0.8 inches long
though it has been known to reach the 4 and 1/2 inches mark deadly or not we
certainly wouldn't enjoy being on the receiving end of their vicious attacks
official they will kill you merchandise is now available at they will kill you
calm some of it is to die for number 3 horseshoe crabs though commonly
referred to as crabs they're nothing of the sort
they belong instead to the family of the Limu Lyday and to be found both in
rivers and oceans so you regretfully have more chances of running into them
than you do with most of the other critters from this list the horseshoe
crabs habitat is shallow coastal waters with muddy floors as they tend to be
quite happy I did just beneath the surface they're commonly found in Asia
will have become a thankfully not so popular dish over the centuries their
entire body is protected by a hard dark carapace and they've two main lateral
eyes along with several extra on the front and top of their heads as well as
one directly above its mouth they have a massive amount of leg summer which they
used to help pin the female down during mating season
others for collecting their food or moving around on the ocean and river
to make this critter even more monstrous his mouth is located in the center of
its many many limbs the horseshoe crab is such an ancient species dating back
its origins to over 450 million years ago that they're effectively considered
living fossils basically this means who most likely never get rid of them so how
long ago were arthropods believed to have evolved
if you guessed B you're right fossils and terrestrial tracks dating from 550
to 450 million years ago show that arthropods
were pre adapted to establish themselves on land with their exoskeletons
providing support against gravity and as a means of moving around without being
dependent on water number 2 Sacculina car scene this little critter is
effectively a parasite that attaches itself to a very much unwilling host in
the case of the Sacculina its preferred victim is usually the green crab
residents of different regions in North Africa and Europe though they're the
most common species to fall prey to this barnacle other crabs are not safe from
its stealthy attack not only is this arthropod utterly disgusting to steerer
but the way in which they survive is truly disturbing as well their call in
life is to feed on and destroy house bit by bit until they die of starvation
well first attaching themselves to the host they've selected the Sacculina
cassini inserted stylet into the crabs fleshy areas and begins to crawl inside
his body eventually they force a sac to pop from the crab site created tendrils
that spread all through its body these tendrils will begin to absorb all
nourishment the host would otherwise retain rendering them confused and weak
this way the parasite effectively controls the victims behavior like the
creepy little puppeteers that they are in the end the parasites will bring upon
their own demise as the crab will inevitably die from atrophy worst part
yet if the host is female it will be forced to carry its parasites eggs in
their womb until it eventually perishes unable to regenerate their own limbs as
they would under normal circumstances or gain any nourishment from the meals they
procure for themselves number one Sabbath or Exeter all you
need to know about the Sabbath or exit jury is his most popular moniker the
tongue is in Laos if this isn't enough to make the hair stand up on the back of
your neck just hang on to your seat because it's about to get a lot worse
the female Simon Thor will attach itself to the tongue of an unwilling victim
while her male counterpart will instead call the fish's gills home just behind
where his mate would first position itself these parasites are small around
point three to one point one inches long with the male always being slightly
smaller than the females of the species the truly nasty process in which they
invade their host body begins when the parasite cuts into this house blood
vessels focusing on the tongue until they eventually cause it to fall off
altogether and an insult to injury he'll then attach themselves to the stub left
behind and effectively become the fish's new tongue gaining nourishment from
everything it eats several fishermen were incredibly shocked and disgusted to
find fishes carrying around these disgusting little critters inside their
mouths where their tongues should have been not a pretty sight to enjoy
especially without proper warning we don't know about you but we certainly
wouldn't be calling that catch our next lunch thanks for watching would you
rather wake up with a giant arthropod crawling in your bed or be a triggered
liberal let us know in the comments section below