Category Archives: fish

Oldest known heart found preserved in 380-million-year-old fish fossil

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A museum display model of the ancient fish, fossils of which have been found to contain the oldest preserved heart of any vertebrate

Soft tissues don’t fossilize well, so most of the time scientists have to infer organ anatomy from just bones. But an unexpected treasure trove of new information has been discovered in Australia, with a 380-million-year-old fish fossil preserving the oldest heart ever found.

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Study shows nanoplastics can travel from plants to insects to fish

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We already know that tiny waterborne plastic waste particles can enter the bodies of fish, which are then consumed by humans. New research, however, shows that such particles can enter the food chain via another route, by traveling from the land, throu… Continue reading Study shows nanoplastics can travel from plants to insects to fish→

Basking sharks found to choose mates by swimming in giant circles

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Even though the plankton-eating basking shark is the world’s second-largest fish, much of its life has eluded observation. Now, however, researchers have determined that the usually solitary animals find mates by meeting up and circling around one anot… Continue reading Basking sharks found to choose mates by swimming in giant circles→

AI-enabled fish gate filters invasive salmon out of Norwegian waterways

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After being introduced to Russia’s White Sea in the 1950s, non-native Pacific salmon have since spread along Norway’s coastline and into its rivers. In an effort to control their numbers, an AI-enabled fish-identifying gate has recently been installed … Continue reading AI-enabled fish gate filters invasive salmon out of Norwegian waterways→

Worms raised on seaweed could be a more sustainable salmon feed

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While the farming of salmon does help take pressure off wild stocks, the feed used to raise the fish still isn’t entirely sustainably sourced. That may change, however, thanks to nutrient-rich worms that eat readily available seaweed.Continue ReadingCa… Continue reading Worms raised on seaweed could be a more sustainable salmon feed→

Wastewater-borne DNA reveals endangered species in fish markets

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Despite protective measures being in place, endangered fish species are regularly caught then sold in open markets. And while visually searching them out can be difficult, a new technology could more easily allow authorities to know which species are b… Continue reading Wastewater-borne DNA reveals endangered species in fish markets→

Study suggests eating salmon-feed fish, instead of farmed salmon

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One of the great ironies of salmon farming lies in the fact that even though the salmon themselves aren’t wild-caught, their feed is partially made up of smaller fish that are. According to new research, it would be ecologically better if we just ate t… Continue reading Study suggests eating salmon-feed fish, instead of farmed salmon→