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
4276	Christiana Bradley And Teddy Carr Move Up Rankings In Floridas Bassmaster Southern Open	underwatertimes	2012-01-25	US
4277	Tourists plead ignorance of fishing laws	ODT	2012-01-13	NZ
4278	Fish Offspring Grow Best At Same Temperature As Parents	underwatertimes	2012-01-12	CA
4279	‘We caught a sea monster’: Florida fishermen reel in massive grouper	Global News	2021-02-18	US
4280	Lead used in fishing rod poses risk to Istanbuls Bosporus	DAILY SABAH	2021-03-15	TR
4281	Floridas New Invasive Species Is A 10-Foot Long River Monster	CBSMiami	2021-03-19	US
4282	Coroner frustrated; Canterbury dive death remains a mystery	NZ Herald	2021-03-12	NZ
4283	Scientists Use Satellite Data To Aid Fishermen In Butterfish Conundrum	underwatertimes	2012-01-06	US
4284	How To Disembowel 30 Salmon In Under A Minute	gizmodo	2011-12-29	AU
4285	New Jersey bill reduces fishing fines for anglers who do not register	pressofatlanticcity	2011-12-16	US
4286	Salmon virus in B.C. for decades, say biologists	CBC News	2011-12-15	CA
4287	Hopping Lungfish Suggest Fish First Took Steps Underwater	Underwatertimes	2011-12-12	US
4288	Fishing for monsters out of the abyss in Susquehanna River	York Daily Record	2021-03-13	US
4289	Revealed: seafood fraud happening on a vast global scale	theguardian	2021-03-15	UK
4290	Scientists rejoice over discovery of native wetland fish thought to be extinct	ABC Central Victoria	2021-03-06	AU
4291	Did Canada cover up deadly salmon virus? Report suggests yes	latimesblogs	2011-12-01	CA
4292	We are Running Out Of Cod	businessinsider	2011-11-28	UK
4293	Fishing rod doubles up as a rifle, too	ubergizmo	2011-11-23	US
4294	Warning As Edible Lionfish Found With Poisonous Ciguatoxin	Underwatertimes	2011-11-22	VI
4295	The Fish That Hunt Like Lions	smithsonianmag	2011-11-21	EG
4296	Fishing Nations Approve Overhaul Of Bluefin Tuna Tracking System	njtoday	2011-11-21	JP
4297	Fishermen to lawmakers: Don't scrap fishing system	Associated Press	2011-11-16	UK
4298	Украинские экологи спрогнозировали дефицит питьевой воды в стране	rusnext	2021-03-23	UA
4299	cientists uncover Antarctic sea creatures trapped under ice for 50 years	livescience	2021-03-20	US
4300	State Record Yellow Perch Caught While Ice Fishing	Fish'n Canada	2021-03-18	US

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