science

Glossary of ichthyology

Glossary of ichthyology 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 Glossary of ichthyology rather than just read about it. In short: This glossary of ichthyology is a list of definitions of terms and concepts used in ichthyology, the study of fishes. A abdomen Belly. abdominal Pertaining to the belly. actinosts A series of bones at the base of the pectoral rays. acuminate Tapering gradually to a point. acute Sharp, pointed. adipose fin A small fleshy fin which lacks fin rays. adnate Joined together. adpressed Pressed against the body. anal fin Th…

Key takeaways

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

Reference excerpt

This glossary of ichthyology is a list of definitions of terms and concepts used in ichthyology, the study of fishes.

abdomen Belly. abdominal Pertaining to the belly. actinosts A series of bones at the base of the pectoral rays. acuminate Tapering gradually to a point. acute Sharp, pointed. adipose fin A small fleshy fin which lacks fin rays. adnate Joined together. adpressed Pressed against the body. anal fin The fin on the median line behind the vent. anal fin origin The most anterior point of the anal fin base. andropodium A modification of the anal fin of males of certain live-bearing species in the family Goodeidae. It is used to transfer reproductive products to the female during mating. ankylosed Grown firmly together. anterior Relating to the front portion. antrose Turned forward. approximate Placed close together. asperity Roughness of surface. asymmetrical Without symmetry. attenuate Tapering to a point, usually in reference to a tail. axillary Pertaining to the axilla or upper angle of the pectoral fin. axillary process An enlarged, pointed scale projecting from the insertion of the pectoral or pelvic fin.

barbel An elongated fleshy projection, usually about the head. basal At or pertaining to the base. base The part of a projection (commonly a fin) which is connected to the body. bathypelagic Living at a depth between 1000 m and 4000 m, but well off the bottom. benthic Bottom-dwelling, living on the sea bed. benthopelagic Pertaining to fishes that swim just above the seabed at depths below about 200 m (the edge of the continental shelf). bicuspid Having two cusps or points. bifid Cleft in two. bifurcate Forked, or divided into two parts or branches. branchial Pertaining to the gills. branchial aperture The gill opening. branchiostegal membrane The membrane connecting the branchiostegal rays and enclosing the gill chamber ventrally. branchiostegals, branchiostegal ray(s) Bony rays supporting the gill membranes behind the lower jaw. bristle A stiff hair-like projection. buckler A bony shield. bycatch Species other than the target species that are caught incidentally in a trawl.

caniniform Shaped like a canine tooth, conical in form. carapace A horny or bony covering encasing the body. cardiform Small set conical outgrowths in a close set patch or band; usually refers to a band of small, close-set, conical teeth. carinate Keeled, having a ridge along the middle line. caruncle A fleshy outgrowth. caudal Pertaining to the tail. caudal fin The tail fin. caudal peduncle The region of the body between the end of the anal fin and the base of the caudal fin. ciliated Fringed with eyelash-like projections. cirri Small, thin appendages, often subdivided into branches. cirrus Singular of cirri. claspers The external reproductive organs of male sharks, rays, and chimaeras. coalesced Grown together. compressed Flattened laterally. confluent Joined together. conical Cone-shaped, with a cylindrical base and a pointed tip. corselet A scaly covering behind the pectorals of some fishes. countershading Body colouration which is dark above and lighter below. crenulate Having the edge slightly scalloped. cutaneous Pertaining to the skin. ctenoid scale A rough-edged scale. cycloid scale A smooth-edged scale.

deciduous Temporary, falling off. demersal Living on or near the sea bed. dendritic Resembling a tree or shrub. denature The "unfolding" of a protein resulting in a lessening of its biological properties. In the case of some fish toxins, denaturing with hot water can lessen painful symptoms. dentate Having tooth-like projections. denticle, denticulate A little tooth, having an edge with small projecting teeth, the placoid scales of cartilaginous fishes. depressed Flattened from top to bottom. dermal Pertaining to the skin. dewlap A fold of loose skin. disc The flattened head and body of various fishes such as stingrays, which also commonly includes the pectoral and ventral fins. distal Remote from the point of attachment. dorsal Pertaining to the back. dorsum The upper (dorsal) surface of the head or body. dorsal fin The fin on a fish's back. dorsal fin origin The most anterior point of the dorsal fin base.

elasmobranchs The cartilaginous fishes: sharks, rays, and allies. electrocyte A type of cell that generates electricity. elongate Extended, drawn out. emarginate Having the margin slightly hollowed. endemic Restricted to a particular region, for example endemic to Australia. entire Having a smooth margin. epibenthic Referring to organisms living on the bottom surface. epipelagic Referring to organisms living in the region between the surface and 200 m depth. erectile Capable of being raised or erected, often referring to spines. esca The lure or "bait" on the end of the illicium of some anglerfishes and relatives. estuarine Living in estuaries.

falcate Scythe-shaped, long, narrow, and curved. falciform Curved like a scythe. filament A slender or thread-like structure. filiform Thread-like. fimbriate Fringed at the margin. finfold Embryonic tissue which develops into a fin. finlet A small fin, positioned behind the dorsal or anal fins, that is supported by a ray or rays. fluviatile Living in rivers. free rear tips (of fins) The posterior tip of the fin that is closest to the most posterior point of the fin base. frontal ridge A ridge running along the top of the head along the midline. furcate Forked. fusiform Tapering towards both ends.

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Glossary of ichthyology

Start with the simplest possible case. Write down what Glossary of ichthyology 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 Glossary of ichthyology 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 Glossary of ichthyology 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 Glossary of ichthyology

In research: Glossary of ichthyology 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 Glossary of ichthyology 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: Glossary of ichthyology is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fishkeeping, Glossaries of zoology, Ichthyology, so understanding it makes those chapters shorter.
In everyday life: Look for Glossary of ichthyology 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 Glossary of ichthyology in 20 minutes

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Frequently asked questions

What is Glossary of ichthyology in simple terms?

This glossary of ichthyology is a list of definitions of terms and concepts used in ichthyology, the study of fishes. A abdomen Belly. abdominal Pertaining to the belly. actinosts A series of bones at the base of the pectoral rays. acuminate Tapering gradually to a point. acute Sharp, pointed. adip…

Why does Glossary of ichthyology 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 Glossary of ichthyology?

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 Glossary of ichthyology.