ANIMALS THAT DO NOT DIE NATURALLY EPISODE 2

This is a continuation of our last week's post on "Immortal Animals Who Defy Death"


Immortal Jellyfish
8.Turritopsis dohrnii
Cnidaria
Anthoathecata
Oceaniidae
Turritopsis
Jellyfish
Lifespan: Immortal unless disease or predation
Did you ever wonder if you could go back to being a child? This species of jellyfish can! Found in the waters of Japan and Mediterranean sea, the immortal jellyfish is the only animal which can go back to being sexually immature after reaching maturity. Turritopsis dohrnii, or Turritopsis, is a small (5 millimeters (0.20 in)) species of jellyfish that uses
transdifferentiation to replenish cells after sexual reproduction. This cycle can repeat indefinitely, potentially rendering it biologically immortal.This process can be indefinite as long as the jellyfish doesn’t die of either disease or predation.


Lobster
9.Homarus americanus
Arthropoda
Malacostraca
Decapoda
Nephropidae
Homarus
Lobster
Lifespan: 100+ years unless predation
Research suggests that lobsters may not slow down, weaken, or lose fertility with age, and that older lobsters may be more fertile than younger lobsters.
Their longevity is due to telomerase , an enzyme that repairs long repetitive sections of DNA sequences at the ends of chromosomes, referred to as telomeres . Telomerase is expressed by most vertebrates during embryonic stages but is generally absent from adult stages of life. However, unlike vertebrates, lobsters express telomerase as adults through most tissue, which has been suggested to be related to their longevity.Lobsters grow by moulting which requires a lot of energy, and the larger the shell the more energy is required.


Lungfish
10.Neoceratodus forsteri
Chordata
Sarcopterygii
Ceratodontiformes
Ceratodontidae
Neoceratodus
Lungfish
Lifespan: 100+ years
Lungfishes are one of the oldest of fish in the planet and unlike other fishes, they can breathe out of water and survive this for long periods of time. In addition to that, they can slow down their metabolic rate and live even without nutrients for years!


Planaria
11.Planaria torva
Platyhelminthes
Rhabditophora
Tricladida
Planariidae
Planaria
Planaria
Lifespan: Indefinite
This ubiquitous organism has a simple incredible organ system that allows the indefinite regeneration of any lost body part. Because of this, this organism apparently can stay young and can never get old (unless it wants to).


Red sea urchins
12.Mesocentrotus franciscanus
Echinodermata
Echinoidea
Echinoida
Strongylocentrotidae
Mesocentrotus
Red Sea Urchins
Lifespan: 200+ Years
Living on seaweeds in shallow waters, Mesocentrotus franciscanus or the red sea urchin is considered to be “ practically immortal “. Although amazing as it may sound, scientists say these urchins can never stop growing but don’t get old. While they can live up to more than a hundred years old, some may reach up to 200 years, given that the environmental conditions are good.


Rough eye rockfish
13.Chordata
Actinopterygii
Scorpaeniformes
Sebastidae
Sebastes
Rough Eye Rockfish
Lifespan: 200+ Years
Coming from the Greek word “ Sebastes ” which means “ magnificent “, this type of rockfish certainly lives up to its name. Known as the longest living marine fish in the world, it can live more than 205 years old! In addition to this characteristic, the Rough eye rockfish is highly distinguishable because of prominent spines in the lower rim of their eyes.

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