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Ompax spatuloides

Ompax spatuloides is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Ompax spatuloides rather than just read about it. In short: Ompax spatuloides was a hoax fish "discovered" in Australia in August, 1872. Said to be poisonous, it could be found on some lists of Australian fishes through the 1930s.

Ompax spatuloides — main illustration
Ompax spatuloides — illustration

Key takeaways

  • Ompax spatuloides belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Ompax spatuloides to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Ompax spatuloides from memory before moving on to harder problems.

Reference excerpt

Ompax spatuloides was a hoax fish "discovered" in Australia in August, 1872. Said to be poisonous, it could be found on some lists of Australian fishes through the 1930s. The fish was a joke perpetrated by people at Gayndah station, Queensland, who prepared it from the body of a mullet, the tail of an eel and the head of a platypus or needlefish. They served it cooked for Karl Theodor Staiger, the director of the Brisbane Museum, and he forwarded a sketch and description of the fake to expert Francis de Laporte de Castelnau, who described the supposed "species" in 1879. The first publication was in the proceedings of the Linnean Society of New South Wales, in which Count Castelnau gave his description with figures reproducing the sketches executed at the time by "a draughtsman" at Staiger's request. Doubts about the existence of the species were expressed as soon as 1881, when William John Macleay included it in a faunal list, but the name continued to appear throughout the twentieth century. Staiger is quoted as saying the fish was brought to him by indigenous people who had obtained it around ten miles away. The components of the specimen were said by an anonymous confessor writing to the Sydney Morning Herald in 1930 to have been sourced from the tail of an eel, a mullet's body, and the head of an Australian lungfish. The last animal, the Australian lungfish, was an extraordinary fish whose existence had only become known to European researchers just a few years before. The addition of a platypus bill, seemingly shown in profile in Castelnau's accompanying figure, is also reported in the letter revealing the hoax. In selecting the name of the genus, Castelnau says "In our present knowledge of this singular fish, some inconvenience might arise from giving it a significant name; and I think it is preferable to design it under the mysterious historical one of Ompax."

Notes

References Castelnau, F. (1879). "On a new ganoïd fish from Queensland". Proceedings of the Linnean Society of New South Wales. 3: 164–165. doi:10.5962/bhl.part.22233. Finney, Vanessa (2023), Putting Nature in its Place: The Australian Museum, 1826 to 1890, Ph.D. Dissertation, Department of History and Philosophy of Science, University of Sydney. Helfman, G.; Collette, B.B.; Facey, D.E.; Bowen, B.W. (2009). The Diversity of Fishes: Biology, Evolution, and Ecology. John Wiley & Sons. ISBN 9781444311907. Macleay, W. (1881). "Descriptive catalogue of the fishes of Australia. Part IV". Proceedings of the Linnean Society of New South Wales. 6: 202–387. doi:10.5962/bhl.part.11870. Saunders, B. (2012). Discovery of Australia's Fishes: A History of Australian Ichthyology to 1930. Csiro Publishing. ISBN 9780643106727.

External links Australian Sporting Records (1998): 117. Bantam Books. Whitley, Gilbert P. (1933): Ompax spatuloides Castelnau, a mythical Australian fish. Am. Nat. 67(713): 563–567. [1]

Illustrations

Ompax spatuloides: Contemporary drawing of the hoax "fish" Ompax spatuloides by Karl Theodor Staiger, director of the Brisbane Museum, Australia, drawn from the cooked fish, and sent to Francis de Laporte de Castelnau in 1879, who went on to give the "species" a scientific description.
Contemporary drawing of the hoax "fish" Ompax spatuloides by Karl Theodor Staiger, director of the Brisbane Museum, Australia, drawn from the cooked fish, and sent to Francis de Laporte de Castelnau in 1879, who went on to give the "species" a scientific description.

Worked examples

Example 1 — a first encounter with Ompax spatuloides

Start with the simplest possible case. Write down what Ompax spatuloides claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Ompax spatuloides before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Ompax spatuloides ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Ompax spatuloides

In research
Ompax spatuloides appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Ompax spatuloides in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Ompax spatuloides is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1872 in Australia, 19th-century hoaxes, Fictional fish, so understanding it makes those chapters shorter.
In everyday life
Look for Ompax spatuloides outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Ompax spatuloides in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Ompax spatuloides means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Ompax spatuloides out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ompax spatuloides in simple terms?

Ompax spatuloides was a hoax fish "discovered" in Australia in August, 1872. Said to be poisonous, it could be found on some lists of Australian fishes through the 1930s.

Why does Ompax spatuloides matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Ompax spatuloides?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Ompax spatuloides.

Tags

  • 1872 in Australia
  • 19th-century hoaxes
  • Fictional fish
  • Hoaxes in Australia
  • Hoaxes in science

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