science

Sebastinae

Sebastinae 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 Sebastinae rather than just read about it. In short: Sebastinae is a subfamily of marine fish belonging to the family Scorpaenidae in the order Scorpaeniformes. Their common names include rockfishes, rock perches, ocean perches, sea perches and rockcods.

Key takeaways

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

Reference excerpt

Sebastinae is a subfamily of marine fish belonging to the family Scorpaenidae in the order Scorpaeniformes. Their common names include rockfishes, rock perches, ocean perches, sea perches and rockcods. Despite the latter name, they are not closely related to the cods in the genus Gadus, nor the rock cod, Lotella rhacina.

Taxonomy Sebastinae, or Sebastidae, was first formally recognised as a grouping in 1873 by the German naturalist Johann Jakob Kaup. Some authorities recognise this family as distinct from Scorpaenidae. FishBase, a finfish database generated by a consortium of academic institutions, does, but the United States Federal government's Integrated Taxonomic Information System and the 5th Edition of Fishes of the World do not, FotW classify it as a subfamily of the Scorpaenidae. Eschmeyer's Catalog of Fishes classifies it as a subfamily of Scorpaenidae, but also classifies the Sebastolobinae (previously considered a tribe of the Sebastinae) as a different subfamily.

Genera The following genera are placed in this group:

Subfamily Sebastinae Kaup, 1873 Helicolenus Goode & Bean, 1896 Hozukius Matsubara, 1934 Sebastes Cuvier, 1829 Sebastiscus Jordan & Starks, 1904

Characteristics Sebastinae species have a compressed body with the head typically having ridges and spines. The gill membranes are not attached to the isthmus. There is a venom gland in the spines of the dorsal, anal and pelvic fins. The largest species is the shortraker rockfish ( Sebastes borealis) which attains a maximum total length of 108 cm (43 in) while the smallest species is Sebastes koreanus which reaches a maximum total length of 13.7 cm (5.4 in).

Distribution and habitat Sebastinae rockfishes are found in the Pacific, Indian and Atlantic Oceans with most species in the largest genus, the ovoviviparous Sebastes with over 100 species, in the North Pacific. They can be found in marine and brackish waters.

References

Illustrations

Worked examples

Example 1 — a first encounter with Sebastinae

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

In research: Sebastinae 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 Sebastinae 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: Sebastinae is common in secondary-school and first-year university syllabi. It links to neighbouring topics Marine fish families, Ovoviviparous fish, Scorpaenidae, so understanding it makes those chapters shorter.
In everyday life: Look for Sebastinae 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 Sebastinae in 20 minutes

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

Frequently asked questions

What is Sebastinae in simple terms?

Why does Sebastinae 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 Sebastinae?

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 Sebastinae.