#1: Mayfly — The Shortest Lifespan of Any Known Animal These insects are the shortest living animals on the planet, as the adult lifespan of a fly from this species is only 24 hours.
The Sign Eviota, Eviota sigillata, a tiny coral reef fish, completes its entire life cycle within an eight week period. This species has the shortest lifespan of any vertebrate.
Indeed, scientists have named this group of insects the Ephemeroptera, Latin for “short-lived flyer.” Researchers believe the record for shortest adult life span belongs to the female mayfly called Dolania americana.
Ephemeral mayflies
We often hear that mayflies, like the whiteflies of the Susquehanna River, have the shortest lifespan of any animal on Earth, just 24 hours for many species.
KSNF/KODE — At 30 years and 286 days old, a Portuguese dog named “Bobi” was recently crowned the world's oldest dog ever, breaking an almost century-old record.
Most jellyfish live less than one year, and some some of the smallest may live only a few days. Each species has a natural life cycle in which the jellyfish form is only part of the life cycle (see video clip showing different life cycle stages).
Great white sharks are arguably most famous for their teeth—all 300 of them that come lined in seven rows.
Aquatic animals. Glass sponges found in the East China Sea and Southern Ocean have been estimated to be more than 10,000 years old. Although this may be an overestimate, it is likely that this is the longest lived animal on Earth.
Cockroach lifespan
Each species of cockroach has their own estimated lifespan but on average, cockroaches live for about one year. Factors such as food supply, habitat and climate affect lifespan. American cockroaches can live for about one year while German cockroaches are estimated to live for about 100 days.
The mayfly Dolania americana in which females typically live less than five minutes is the shortest lived of these, and is therefore the insect with the shortest reproductive life (Sweeney & Vannote 1982).
Most spiders live about two years, but some have been known to live up to 20 years when in captivity. Female spiders tend to live longer than male spiders. Many male spiders reach maturity within two years and die after mating.
To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
They have the shortest lifespan of all the animals. Complete step by step answer: The lifespan of a mayfly is 1 day. The life cycle of mayflies passes through four stages: egg, nymph, subimago, and imago.
A comparable study on chimpanzees found that bees had the worst memory, with a recall duration of just 2.5 seconds. Also earning bees a spot on the list of top 10 animals with the worst memory in the world.
Leech: The interior structure of a leech is divided into 32 different segments, each of which has its own brain.
The leeches that I have driven several hundred miles to encounter are freshwater, bloodsucking, multi-segmented annelid worms with 10 stomachs, 32 brains, nine pairs of testicles, and several hundred teeth that leave a distinctive bite mark.
Can jellyfish feel pain? Jellyfish don't feel pain in the same way that humans would. They do not possess a brain, heart, bones or a respiratory system. They are 95% water and contain only a basic network of neurons that allow them to sense their environment.
Never touch a jellyfish that's washed up on shore. Dead jellyfish still have venom in their tentacles that can sting on contact.
Bioluminescence: Some species of moon jellyfish are capable of bioluminescence, producing light through a chemical reaction in their bodies. This light is used for a variety of purposes, including attracting mates, deterring predators, and attracting prey.