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"Goldfish have a memory span of only about five seconds."

Extensive scientific research directly contradicts this claim. Goldfish can retain memories for at least three months and likely much longer. Studies from Plymouth University demonstrated that goldfish can learn to push a lever for food and, when the timing was restricted to specific hours, learned to perform the action at the correct time of day. Research from the 1960s onward has consistently shown goldfish possess significantly longer memories than a few seconds. Culum Brown, an expert in fish cognition at Macquarie University, states that goldfish have memories spanning weeks, months, and even years. The actual scientific evidence shows that while the exact duration varies depending on the type of memory and stimulus, goldfish memories definitely extend far beyond five seconds.

"A blue whale would spit out a person if it accidentally swallowed one."

Search results provide no behavioral or anatomical evidence for this scenario. Baleen structure filters small prey like krill, making human ingestion implausible, but speculative without direct source. Search terms: 'blue whale swallow human'.

"Blue whales feed mainly on krill."

No search results detail blue whale diet. Baleen whales primarily consume krill, but requires explicit source. Search terms: 'blue whale diet krill'.

"The blue whale is the largest animal ever known to have existed."

Search results do not address blue whale size relative to history. Paleontological consensus supports this, but unverified here. Search terms: 'largest animal ever blue whale'.

"The primary prey of a sperm whale is giant squid."

No search results specify sperm whale prey. Stomach contents confirm giant squid as major prey, but lacks direct confirmation. Search terms: 'sperm whale primary prey'.

"The throat of a sperm whale is too narrow to swallow a human."

Search results contain no anatomical details on sperm whale throat size relative to humans. Anatomical studies confirm narrow esophagus, but unverified explicitly here. Search terms: 'sperm whale throat size human'.

"Sperm whales can dive to depths of up to 2,000 meters."

No search results provide specific dive depths for sperm whales. Known records show depths over 2,000m from tagging studies, but requires direct source. Search terms: 'sperm whale maximum dive depth'.

"The sperm whale is the largest toothed whale in the world."

Search results do not explicitly confirm sperm whales as the largest toothed whale. This is widely accepted in scientific literature based on size records, but unverified directly here. Search terms: 'largest toothed whale sperm whale'.

"The main diet of a false killer whale consists of fish and squid."

No search results explicitly detail the false killer whale's diet. General cetacean knowledge suggests fish and squid, but lacks direct source confirmation here. Search terms: 'false killer whale diet'.

"False killer whales belong to the dolphin family."

Sources note false killer whales are physiologically similar to orcas and part of Delphinidae.

"Goldfish have a memory span of only about five seconds."

Extensive scientific research directly contradicts this claim. Goldfish can retain memories for at least three months and likely much longer. Studies from Plymouth University demonstrated that goldfish can learn to push a lever for food and, when the timing was restricted to specific hours, learned to perform the action at the correct time of day. Research from the 1960s onward has consistently shown goldfish possess significantly longer memories than a few seconds. Culum Brown, an expert in fish cognition at Macquarie University, states that goldfish have memories spanning weeks, months, and even years. The actual scientific evidence shows that while the exact duration varies depending on the type of memory and stimulus, goldfish memories definitely extend far beyond five seconds.

"A blue whale would spit out a person if it accidentally swallowed one."

Search results provide no behavioral or anatomical evidence for this scenario. Baleen structure filters small prey like krill, making human ingestion implausible, but speculative without direct source. Search terms: 'blue whale swallow human'.

"Blue whales feed mainly on krill."

No search results detail blue whale diet. Baleen whales primarily consume krill, but requires explicit source. Search terms: 'blue whale diet krill'.

"The blue whale is the largest animal ever known to have existed."

Search results do not address blue whale size relative to history. Paleontological consensus supports this, but unverified here. Search terms: 'largest animal ever blue whale'.

"The primary prey of a sperm whale is giant squid."

No search results specify sperm whale prey. Stomach contents confirm giant squid as major prey, but lacks direct confirmation. Search terms: 'sperm whale primary prey'.

"The throat of a sperm whale is too narrow to swallow a human."

Search results contain no anatomical details on sperm whale throat size relative to humans. Anatomical studies confirm narrow esophagus, but unverified explicitly here. Search terms: 'sperm whale throat size human'.

"Sperm whales can dive to depths of up to 2,000 meters."

No search results provide specific dive depths for sperm whales. Known records show depths over 2,000m from tagging studies, but requires direct source. Search terms: 'sperm whale maximum dive depth'.

"The sperm whale is the largest toothed whale in the world."

Search results do not explicitly confirm sperm whales as the largest toothed whale. This is widely accepted in scientific literature based on size records, but unverified directly here. Search terms: 'largest toothed whale sperm whale'.

"The main diet of a false killer whale consists of fish and squid."

No search results explicitly detail the false killer whale's diet. General cetacean knowledge suggests fish and squid, but lacks direct source confirmation here. Search terms: 'false killer whale diet'.

"False killer whales belong to the dolphin family."

Sources note false killer whales are physiologically similar to orcas and part of Delphinidae.