Do Fish Care About Their Bodies?

Do Fish Care About Their Bodies? | 150 years is the limit of a human
lifespan in theory by this age our body
shuts down the ability to recover from
injury disease and stress which leads to
death this proves once again that every
creature on the planet has a certain
strength limit except for fish because
fish don’t need a body to survive
actually being a fish is quite
challenging just imagine you live in a
world where everything and i mean it
absolutely everything wants to eat you
birds mammals humans other fish even
insects but it seems like fish got used
to this steve where’s your back my back
did i have one there are cases when the
fish lost a bigger part of its body and
survived well not in the wild though for
example a fish rescued from a thai
market survived six months without half
its body and tail apparently it tried to
escape from the artificial pond but
broke its tail when it fell as a result
half of its body along with the tail
simply rotted away but the fish didn’t
die moreover the person who bought it in
the market took it around villages so
that as many people as possible could
see the strange exhibit unfortunately in
the end the fish still died although i
didn’t find a reason why perhaps it
tried to make another escape attempt and
overestimated its strength but can you
really live without half of your body
when you’re a fish i mean i thought a
wild nature is quite merciless and fish
like that instantly become someone’s
prey also the wound can get infected
hold on maybe it’s all about salt water
let’s assume that most often the
resilient halves of fish are found in
the seas and oceans is salt water good
for healing wounds unfortunately so far
scientists have not carried out specific
experiments on fish things get confusing
when it comes to humans too saltwater
for example saline has long been used to
heal wounds in particular to cleanse
foreign bodies out of the wound or
before dressing it at the same time the
water in the ocean is so far from being
sterile in theory it can help heal
wounds but it can also carry infection
into them which will only make things
worse this means that seawater is not
the answer so why do sea creatures
actually live so long and ignore
injuries and when i say long i mean a
very old age you’ve probably heard about
the greenland shark which can live for
500 years and reaches sexual maturity
only at 150 years old meanwhile i didn’t
find any information about long-lived
giraffes okay the sea and the giraffes
are out of the equation it’s about the
fish themselves evolution made them
champions of regeneration but only among
vertebrates jellyfish can also
regenerate quickly and literally
reassemble themselves piece by piece but
these skills of the fish are still
amazing regrow the fin it’s easy but you
won’t surprise anyone with that scales
come on people also know how to heal
wounds what about the retina spinal cord
pancreas hearts some fish can regenerate
vital internal organs hardly any
vertebrate comes even close to these
results except for deadpool and
wolverine of course but they’re mutants
so they don’t count
oh i did have a back but in nature
nothing appears without a reason and
since fish have acquired amazing
regeneration skills there must be some
reason for that as it often happens with
exciting questions scientists do not
have a clear answer but there are
theories apparently in the early stages
of evolution environmental conditions
were very aggressive in short the
likelihood of dying was very high new
species were struggling for food and a
place in the sun so they needed to
survive somehow if our very very distant
ancestors did not find a solution there
would simply be no life on earth and
regeneration turned out to be a great
solution you can reproduce if you learn
to regrow the necessary organs your
neighbor just bit off well to find
evidence in favor of this theory we need
to look in the past the good news is
that we don’t need a time machine we
just need to catch the right fish gars
are an order of ray-fenned fish that can
even regenerate bones in their fins at
the same time they’re considered
dinosaurs in the world of fish because
they changed very slowly throughout
their evolution and retained many
features of their distant ancestors
in short that’s just what you need to
study the history of regeneration but
the most interesting thing is that the
gars genome is very similar to the human
genome in fact there’s something like a
bridge species between ancient creatures
and us research shows humans also have
the genes responsible for regeneration
in fish we have everything we need
except for one detail it’s like a broken
kettle imagine that you have great tea
water a cup cookies and a cool electric
kettle where they forgot to put the
power button
humans lack the genetic mechanism to
activate these genes the switches appear
to have been lost or changed during the
evolution of mammals which includes
humans although it looks pretty weird
regeneration is a really cool feature
that helps survival and that’s what
every creature on the planet yearns for
survive and procreate so why is our
ability to regenerate reduced so much
over time doesn’t this contradict
everything we know about nature well the
thing is regeneration is a bit lazy if
you compare a fish and a tiger it’s
clear who is more complex in terms of
body structure what about a bird and a
frog the bird is definitely more complex
the more complex the organism the more
resources and time it needs for
regeneration this makes no sense when
you can easily and quickly patch up the
affected area this is how our wounds
heal but you’ll never persuade your body
to regrow say a finger by the way for
the same reason regeneration does not
work for very small creatures like
butterflies why waste time and effort on
rebuilding the leg if you have two more
days to live
what do you mean why i have another
theory maybe too powerful regeneration
would just prevent us from evolving it’s
like a computer game when you have the
option to save you don’t have to worry
too much about what you do in any case
you’ll start from the save point with
the same conditions but when you can’t
save you begin to assess your every
decision ponder a lot and try to guess
what happens next you have no right for
a mistake so the lack of powerful
regeneration could well make our brain
evolve and look for other ways of
survival sounds pretty logical don’t you
think but if regeneration only slows
down evolution then it must be bad for
the development does this mean
cold-blooded creatures are less lucky
than warm-blooded ones actually this is
a rather difficult question on the one
hand cold-blooded animals need a
constant supply of heat while
warm-blooded ones cope on their own
imagine that your smartphone is charging
by itself warm-blooded animals can live
everywhere they know how to raise their
body temperature to kill microbes
cold-blooded animals have to look for a
source of heat and this also takes more
time than regular recharging and when
you stay in one place for a long time it
makes you an easy target for predators
in short only cons however warm-blooded
animals have problems too they
constantly lose energy and the bigger
the animal the more food it needs to
restore it and essentially survive take
for example pandas they have to spend
from 10 to 16 hours a day on feeding
alone no wonder they’ve been endangered
for a long time meanwhile cold-blooded
animals require much less food to
survive if you’re already wondering
whether it’s better to be warm-blooded
or cold-blooded i have no answer to this
question moreover i don’t think that
nature can answer it as well but
evolution knows exactly what it’s doing
perhaps in a couple million years it’ll
create a universal organism without any
flaws but for now for now here’s a fact
for you even dead fish can regenerate
not itself though it had seen people and
fish are too different but as i said our
genome is similar and the skin of a fish
is surprisingly good for healing human
wounds in addition it has
anti-inflammatory antimicrobial
antiviral hypoallergenic and analgesic
effects yes we’re still talking about
fish the fish skin makes healing much
faster moreover it’s cheaper and needs
less processing there are only two
serious downsides so far the fish skin
hasn’t gotten a widespread application
well in the fish usually protest see you

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