biology

Thrissina

Thrissina 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 Thrissina rather than just read about it. In short: Thrissina is a genus of anchovies in the family Engraulidae. Some authorities regard this genus as invalid, and classify the species as part of Thryssa.

Key takeaways

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

Reference excerpt

Thrissina is a genus of anchovies in the family Engraulidae. Some authorities regard this genus as invalid, and classify the species as part of Thryssa. FishBase considers 13 species as valid (those shown with common names in the following species list).

Species Thrissina aurora Hata, Lavoué, Chungthanawong & Motomura, 2023 Thrissina baelama (Fabricius, 1775) (Baelama anchovy) Thrissina belvedere Hata, Quan, Ha & Motomura, 2020 (Ha Long thryssa) Thrissina chefuensis (Günther, 1874) (Chefoo thryssa) Thrissina cultella Hata & Motomura, 2019 (cutlass thryssa) Thrissina evermanni (Jordan & Seale, 1906) (Evermann’s baelama anchovy) Thrissina katana Hata, Lavoué & Motomura, 2022 Thrissina mystica Hata, Lavoué & Motomura in Hata, Lavoué, Psomadakis, Osmany & Motomura, 2025 (Mystique thryssa) Thrissina polynemoides (Günther, 1868) (African baelama anchovy) Thrissina samam (Montrouzier, 1857) (Samam baelama anchovy) Thrissina serena Hata & Motomura, 2019 (Arabian thryssa) Thrissina splendida Hata, 2022 Thrissina supra Hata, Psomadakis, Osmany & Motomura, 2021 (Pakistan thryssa) Thrissina tuberculosa (Lacepède, 1803) (Mauritian baelama anchovy) Thrissina vitrirostris (Gilchrist & W. W. Thompson, 1908) (Orangemouth anchovy) Thrissina whiteheadi (Wongratana, 1983) (Whitehead's thryssa)

References

Illustrations

Worked examples

Example 1 — a first encounter with Thrissina

Start with the simplest possible case. Write down what Thrissina 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 Thrissina 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 Thrissina 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 Thrissina

In research: Thrissina 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 Thrissina 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: Thrissina is common in secondary-school and first-year university syllabi. It links to neighbouring topics Actinopterygii genera, Anchovies, Clupeiformes stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Thrissina 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 Thrissina in 20 minutes

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

Frequently asked questions

What is Thrissina in simple terms?

Thrissina is a genus of anchovies in the family Engraulidae. Some authorities regard this genus as invalid, and classify the species as part of Thryssa.

Why does Thrissina 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 Thrissina?

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 Thrissina.