The answer to the question "Which fish has no bones at all?" is jellyfish.
While the term "jellyfish" might suggest a fish-like creature, jellyfish are actually invertebrates, meaning they belong to a group of animals without a backbone or bony skeleton. They are marine animals belonging to the phylum Cnidaria.
Here's a breakdown:
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Fish: True fish are vertebrates, possessing a spinal column made of bone or cartilage. Examples include salmon, tuna, and sharks (which have cartilage instead of bone).
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Jellyfish: They lack a skeleton entirely. Their bodies are composed primarily of water, supported by a gelatinous substance called mesoglea.
Therefore, a jellyfish perfectly fits the description of an animal commonly referred to as a "fish" that has no bones at all.
