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
3576	The sight and smell of dead fish around Tampa Bay is hard to miss	fox13news	2021-07-10	US
3577	Billions in fishing subsidies finance social, ecological harm, report finds	mongabay	2021-07-07	US
3578	Loch Ness Monster spotter furious at plans for fish farm in Nessie's territory	dailyrecord	2021-07-09	UK
3579	Scientist uses a microscope to reveal the shocking microscopic shards of plastic lurking inside fish fingers	dailymail	2021-06-28	UK
3580	Environment Canada study finds land-based fish farms affecting ecosystem	CBC News	2016-05-09	CA
3581	Fish with 'human face' makes splash online	Mo Hong'e	2016-05-09	CN
3582	Herpes virus to be used in fight against carp in Murray River, Christopher Pyne says	abc	2016-04-30	AU
3583	Catch of the day! The moment a fisherman reeled in a huge sawfish as stunned beach-goers looked on	dailymail	2016-05-01	UK
3584	Fingal fishermen caught 20kg tuna using drone to spot the fish	goldcoastbulletin	2016-05-03	AU
3585	How goldfish became a lucrative Great Lakes commercial catch	mlive	2019-01-19	US
3586	Drinking like a fish! Incredible moment fish-out-of-water gulps down beer on side of anglers' boat	dailymail	2016-04-26	UK
3587	Свой-чужой: как дружба между рыбами спасает от хищников	habr	2021-07-24	RU
3588	Canada announces big cuts to commercial fishing to protect wild salmon that Washington’s orcas eat	The Seattle Times	2021-06-30	CA
3589	Mumbai’s Koli fishermen face a perfect storm: climate change, cyclones, and illegal fishing	scroll	2021-07-04	IN
3590	Asian Kiwi says he was racially profiled as an 'over-fisher' during Whangamatā trip	stuff	2021-07-05	NZ
3591	2 Men Caught Using Illegal Electrofishing Device Along The Red River	newson6	2021-07-06	US
3592	Giant tarpon fish almost eats woman's hand during feeding time	telegraph	2021-07-20	UK
3593	Fish near angling hotspots are more clever, avoid capture	upi	2016-04-26	US
3594	DNR considers regulating underwater cameras, removing minimum size for sturgeon spearing	FOX 11 News	2021-06-28	US
3595	Fish and Game reports electroshocking, removing 10,654 rainbow trout from South Fork	idahostatejournal	2021-07-03	US
3596	Turkey now home to worst invasive fish species	dailysabah	2021-07-02	TU
3597	This underwater drone lures and photographs your pet fish	cnet	2016-04-18	US
3598	‘River Monsters’ host Jeremy Wade rarely eats fish	pagesix	2016-04-12	US
3599	Wild water snake climbs onto Texas man's lap for a fish snack	upi	2016-04-05	US
3600	‘Barbarian style’ ice fishing a fun alternative	lansingstatejournal	2016-03-26	CA

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