biology

Symphysodon discus

Symphysodon discus 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 Symphysodon discus rather than just read about it. In short: Symphysodon discus, the red discus or Heckel discus, is a species of cichlid endemic to the Amazon Basin of Brazil, where found in the lower Rio Negro, upper Uatumã, Nhamundá, Trombetas and Abacaxis. This species is essentially restricted to blackwater habitats with a high temperature of 26–32 °C (79–90 °F) and low pH of 4.2–5.2.

Key takeaways

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

Reference excerpt

Symphysodon discus, the red discus or Heckel discus, is a species of cichlid endemic to the Amazon Basin of Brazil, where found in the lower Rio Negro, upper Uatumã, Nhamundá, Trombetas and Abacaxis. This species is essentially restricted to blackwater habitats with a high temperature of 26–32 °C (79–90 °F) and low pH of 4.2–5.2. This species grows to a length of 20 centimetres (7.9 in) SL. This species can also be found in the aquarium trade.

Parental care Small fry of this fish feed on the mucus secreted by their parents.

References

External links Media related to Symphysodon discus at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with Symphysodon discus

Start with the simplest possible case. Write down what Symphysodon discus 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 Symphysodon discus 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 Symphysodon discus 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 Symphysodon discus

In research: Symphysodon discus 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 Symphysodon discus 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: Symphysodon discus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cichlid fish of Brazil, Endemic fish of Brazil, Fish described in 1840, so understanding it makes those chapters shorter.
In everyday life: Look for Symphysodon discus 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 Symphysodon discus in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Symphysodon discus 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 Symphysodon discus out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Symphysodon discus in simple terms?

Why does Symphysodon discus 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 Symphysodon discus?

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 Symphysodon discus.