Enormous Oarfish Can Weigh More Than 250 Kilograms

A ribbon-thin fish can weigh as much as three adults.

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Water makes up a significant percentage of fish body mass, contributing to their weight despite slender builds.

Although slender in appearance, large oarfish can weigh over 250 kilograms. The length-to-thickness ratio can mislead observers into underestimating total mass. Their bodies are composed largely of water-rich tissues, contributing to substantial weight. When lifted during scientific examination, the mass surprises even seasoned researchers. This combination of thin profile and heavy mass creates a perceptual mismatch. Scale is not only about length but density and total biomass. A creature that looks delicate can rival multiple humans in weight.

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Picture attempting to move a silver ribbon longer than a bus that weighs as much as three grown adults combined. The visual suggests lightness, yet the scale says otherwise. Human perception often associates bulk with mass, but the ocean defies that shortcut. In water, buoyancy masks true weight. Out of water, gravity reveals it dramatically. The illusion collapses under measurement.

Large biomass in midwater environments influences nutrient transport and energy flow. Even non-predatory giants represent concentrated packets of oceanic productivity. When they die, their sinking bodies contribute to deep-sea carbon transfer. This process, sometimes called marine snow at larger scale, feeds abyssal ecosystems. A single oarfish can become a vertical nutrient bridge. The ribbon eventually becomes rain.

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Encyclopaedia Britannica

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