When did the first fish live on Earth – and how do scientists figure out the timing?

When did the first fish live on Earth – and how do scientists figure out the timing?

By Isaac Skromne

Source: roanoke

7/18/2022

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com.

How do you figure out how long ago fish were created? Hundreds of millions of years is a long time ago. – Josh, age 11, Ephrata, Pennsylvania

The oldest fossils of animals resembling a fish date back between 518 million and 530 million years ago. Discovered in China and called Haikouichthys, these animals were about an inch long (2.5 cm) and had a head with seven to eight slits at its base that looked like gills. They also had a distinct spine surrounded by muscles.

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News Id		Source	Stamp	country
4301	WVs blue cat fishery rapidly becoming destination resource	wvgazettemail	2021-03-06	US
4302	Microplastics found in seven popular fish species near Marina by NCCR researchers	Chennai News	2021-03-09	IN
4303	NJ fishing community says virus aid helps keep it afloat	theridgefieldpress	2021-03-08	US
4304	Farm-Raised Tilapia, With A Dash Of Antibiotic	NPR	2011-11-11	CA
4305	Fish Follow The Simple Rules Of Motion To School	underwatertimes	2011-11-07	SW
4306	Angler eats huge sea bass he caught only to discover it was a record breaker after he had tucked in	Daily Mail	2011-11-07	UK
4307	Illegal Fishing Threatens To Drive Eastern Atlantic Bluefin Tuna Extinct	Underwatertimes	2011-10-18	US
4308	Fishing film nets documentary prize	BBC News	2011-10-12	UK
4309	Manhattan man charged after dropping detergent in fish tank, killing fish and coral	ksnt	2021-03-10	US
4310	New Mexico teen catches possibly record breaking fish, releases it before getting official weight	Fox News	2021-03-07	US
4311	No fish tale: Missouri angler catches huge invasive black carp	fox2now	2021-03-09	US
4312	Norway's salmon rot as China takes revenge for dissident's Nobel Prize	independent	2011-10-23	UK
4313	Research Finds Fish Behavior May Seal Their Fate	underwatertimes	2011-10-04	CA
4314	The World's Largest Floating Fish Factory	gizmodo	2011-10-03	US
4315	Pros Carr, Bradley Qualify For Bassmaster WS National Championship	underwatertimes	2011-10-02	CA
4316	Mystery of Canada's missing salmon continues	nature	2011-09-28	CA
4317	Illusion Of Plenty' Masking Fish Population Collapse Off California Coast	Underwatertimes	2011-09-27	US
4318	Wind Whips Angler Teddy Carr At Oneida Lake	Underwatertimes	2011-09-24	US
4319	Study Finds Aquarium Fishes Are More Aggressive In Reduced Environments	underwatertimes	2011-09-23	US
4320	Small Fish Recover Faster Than Large Fish	Underwatertimes	2011-09-21	US
4321	The Science Behind the Fishy Smell in Smelly Fish	miaminewtimes	2011-09-20	CA
4322	Anglers Bradley, Carr Land Enough Fish To Qualify For Regional Bassmaster Event	underwatertimes	2011-09-19	US
4323	Bay of Fundy farmed salmon found in rivers	CBC News	2011-09-16	CA
4324	Fish shrinkage probed in lab	BBC News	2011-09-18	NO
4325	Salmon And Other Fish Predators Rely On No Guts, No Glory Survival Tactic	underwatertimes	2011-09-15	US

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