earth science

Gigantactis paxtoni

Gigantactis paxtoni is a earth 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 Gigantactis paxtoni rather than just read about it. In short: Gigantactis paxtoni, Paxton's whipnose or slender anglerfish, is a species of marine ray-finned fish belonging to the family Gigantactinidae, the whipnose anglers. This species is found in the deeper waters of the southern Indo-Pacific.

Key takeaways

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

Reference excerpt

Gigantactis paxtoni, Paxton's whipnose or slender anglerfish, is a species of marine ray-finned fish belonging to the family Gigantactinidae, the whipnose anglers. This species is found in the deeper waters of the southern Indo-Pacific.

Taxonomy Gigantactis paxtoni was first formally described in 1981 by Erik Bertelsen, Theodore W. Pietsch and Robert J. Lavenberg, with its type locality given as 100 km (62 mi) east of Broken Bay off New South Wales at 33°28'S, 152°33'E from a depth of 0 to 900 m (0 to 2,953 ft), where the sea bed was at a depth of 4,200 m (13,800 ft). This species is placed in the genus Gigantactis, which the 5th edition of Fishes of the World classifies within the family Gigantactinidae, a family within the suborder Ceratioidei, the deep sea anglerfishes of the order Lophiiformes, the anglerfishes.

Etymology Gigantactis paxtoni is a member of the genus Giganactis, the name of which is a combination of gigantos, meaning "giant", with actis, which means "ray", an allusion to the unusually long illicium of the genus's type species, G. vanhoeffeni. The specific name honours John Paxton, an ichthyologist at the Australian Museum, who provided the specimens on which Bertelsen, Pietsch and Lavenberg based their description, and for his contributions to the study of the ichthyology of the deep seas.

Description Gigantactis paxtoni is a black-coloured anglerfish with an extremely long illicium which has a length equivalent to 168% to 198% of the standard length. There is a tuft of white filaments at the illicium's base, with the bulb of the esca tapering towards a dark, conical extension covered in spinules on its tip; the bulb has a length equivalent to between 12% and 28% of the standard length. The long teeth on the dentary are arranged in 3 or 4 rows. There are small, unpigmented papillae and short filaments on the bulb of the esca and its elongation. This species has a maximum published standard length of 29.5 cm (11.6 in).

Distribution and habitat Gigantactis paxtoni is found in the southern Indian and Pacific Oceans between 33°S and 44°S, as far south as the northern boundary of the Subantarctic Water Mass. It has also been found off eastern Australia and New Zealand, and in the Halmahera Sea. It has been recorded from depths between 540 and 1,500 m (1,770 and 4,920 ft).

References

Worked examples

Example 1 — a first encounter with Gigantactis paxtoni

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

In research: Gigantactis paxtoni appears in earth 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 Gigantactis paxtoni 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: Gigantactis paxtoni is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bioluminescent fish, Deep sea fish, Fish described in 1981, so understanding it makes those chapters shorter.
In everyday life: Look for Gigantactis paxtoni 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 Gigantactis paxtoni in 20 minutes

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

Frequently asked questions

What is Gigantactis paxtoni in simple terms?

Why does Gigantactis paxtoni matter?

Because it connects several earth 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 Gigantactis paxtoni?

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 Gigantactis paxtoni.