biology

Opisthoteuthis dongshaensis

Opisthoteuthis dongshaensis is a biology 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 Opisthoteuthis dongshaensis rather than just read about it. In short: Opisthoteuthis dongshaensis is a species of octopus located in the South China Sea. Name and habitat The type specimens, the animals used to formally describe the species, were found off Pratas Island.

Key takeaways

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

Reference excerpt

Opisthoteuthis dongshaensis is a species of octopus located in the South China Sea.

Name and habitat The type specimens, the animals used to formally describe the species, were found off Pratas Island. This is also known as Dong Sha Island, hence the species name. In Chinese (transliterated to the Latin alphabet), O. dongshaensis is called Dongsha-Miàn-Xiāo. The species is only known from waters near Dong Sha Island. O. dongshaensis lives 660–1,015 m (2,165–3,330 ft) deep. O. dongshaensis occupies the benthic zone, living on or near the seafloor. It may be threatened by fishing in the area; however, further research is still needed. The type specimens of the species are held by the National Museum of Natural Science in Taichung, Taiwan.

Anatomy

O. dongshaensis is small and has a roughly bell-shaped body. The males, like many other octopuses in the genus Opisthoteuthis, have some enlarged suckers. Males have oversized suckers in the distal field (at the ends of the arms; far from the body). These enlarged suckers only exist on some arms, while other arms have small suckers throughout. Females have proportionally smaller suckers than males; however, females have more suckers on average. These octopuses have wide heads and large eyes. They also have large fins to aid in movement. The fins are long when compared to those of other cirrate octopus species. Thick, fleshy webs connect their arms, creating the distinctive "umbrella" shape. The arms may be of different lengths.

References

Further reading Chung-Cheng Lu; Wen-Sung Chung (2017). Guide to the Cephalopods of Taiwan (in Chinese and English). National Museum of Natural Science, Taichung, Taiwan. pp. 430–431. ISBN 978-986-05-2569-4. OCLC 1011978220.

Worked examples

Example 1 — a first encounter with Opisthoteuthis dongshaensis

Start with the simplest possible case. Write down what Opisthoteuthis dongshaensis claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Opisthoteuthis dongshaensis 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 Opisthoteuthis dongshaensis 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 Opisthoteuthis dongshaensis

In research: Opisthoteuthis dongshaensis appears in biology 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 Opisthoteuthis dongshaensis 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: Opisthoteuthis dongshaensis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cephalopods described in 2010, Cephalopods of Asia, IUCN Red List data deficient species, so understanding it makes those chapters shorter.
In everyday life: Look for Opisthoteuthis dongshaensis 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 Opisthoteuthis dongshaensis in 20 minutes

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

Frequently asked questions

What is Opisthoteuthis dongshaensis in simple terms?

Opisthoteuthis dongshaensis is a species of octopus located in the South China Sea. Name and habitat The type specimens, the animals used to formally describe the species, were found off Pratas Island.

Why does Opisthoteuthis dongshaensis matter?

Because it connects several biology 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 Opisthoteuthis dongshaensis?

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 Opisthoteuthis dongshaensis.