The phrase "a deadly fish" is correct and usable in written English.
It can be used to describe a type of fish that is dangerous or lethal, either due to its venom, predatory nature, or other harmful characteristics.
Example: "The pufferfish is known as a deadly fish because it contains toxins that can be fatal if ingested."
Alternatives: "a lethal fish" or "a dangerous fish".
A deadly fish disease is thought to have been found in the wild for the first time, threatening Britain's angling industry with disaster.
A deadly fish virus spreading through upstate New York has been detected in three new locations and for the first time has been found in rainbow trout, one of the state's top game fish, state scientists said yesterday.
And no one was telling consumers that these fillets were actually from a deadly fish prepared by less-than-skilled hands.
One day, however, Mr. Clifford did spy a promising lump in the murk and was fanning off the silt until, he recalled, he stopped suddenly "an inch short" of hitting what turned out to be a deadly stone fish.
Just when you thought it was safe to go back into a violent funnel of air and rain that has also picked up deadly fish known for their cartilaginous skeletons: the Syfy channel announced on Wednesday morning that it had given the official green light to a sequel to "Sharknado," its recent made-for-TV movie that became a social media sensation, if not quite a ratings smash.
Vietnam has been involved in deadly fishing grounds clashes with China, with whom it fought a war in 1979.
RIO DE JANEIRO — With a deadly virus threatening its fish farms, Chile has introduced measures to improve the sanitary conditions of its salmon industry and reduce the levels of antibiotics used to treat the fish.
SEATTLE — Canadian fisheries and food safety officials said Tuesday that new government tests showed no evidence of a deadly salmon virus in fish that advocates for wild salmon reported last month contained traces of the virus.
SINGAPORE — Last December, a deadly plankton bloom wiped out 34 fish farms off the coast of Singapore, killing most of their stock — about 400,000 fish, including tiger garoupa, sea bass and red snapper.
As word spread that infectious salmon anemia, a deadly virus that has devastated farmed fish in Chile, had been found for the first time in prized wild Pacific salmon, there remained much uncertainty about the finding and what its potential impact could be.
In perhaps the most egregious episode yet of a deadly year on the Mediterranean, a fishing boat packed with hundreds of migrants had been rammed by another smuggling vessel when those on board refused to get on a smaller boat.
