Sea Life Plant and Animal Terminology

> Abdomen

> Anus

> Benthic Zone

> Bilateral Symmetry

> Bioerosion

> Biome

> Caudal Fin

> Ciliary Tracts

> Cnidocyst

> Crustaceans

> Dentition

> Detritus

> Dimorphism

> Dorsal Fin

> Epidermis

> Extant

> Gametes

> Gonochoristic

> Hermaphrodites

> Heterptrophic

> Mollusks

> Mucus

> Nocturnal

> Notochord

> Operculum

> Osculum

> Pectoral Fins

> Sedentary

> Symbiosis

> Tentacles

> Zooid

> Zooplankton

Terminology Definitions and Explanations

Which part of the animal's anatomy is the Abdomen? The abdomen is the region of the body of a vertebrate that is furthest from the mouth containing the digestive and reproductive organs.

What is the meaning of Anus? The anus us the end of the digestive tract or gut through which waste products of digestion are excreted.

Where is the Benthic Zone? The benthic zone is the ecological region at the lowest level of a body of water. This could be an ocean or a lake or may include the sediment surface layers.

What is the meaning of Bilateral Symmetry in animals? Often called 'plane symmetry' the term means that the animal has sameness of both right and left sides displaying a mirror image of the other.

What is Bioerosion? The removal of calcium carbonate substrate is called bioerosion. Corals increase in size due to calcium carbonate or limestone formation. This is how they form a skeleton or framework to support coral reef organisms. The crunching action of bioeroders breaks down the substrate into sand. Fortunately nature has a way of controlling the delicate balance between excessive erosion and insufficient accretion.

What is a marine Biome? The marine biome is the largest biome in the world. It is a geographical area notable for the species living within it. The planet's features exist in two principle biome categories which are the terrestrial biome (land) and the aquatic biome (water).

Where is the fish's Caudal Fin? The caudal fin is the tail fin of a fish used for steering, balancing or propulsion.

What are Ciliary Tracts? Ciliary tracts are lines of tiny hair-like extensions. Some creatures use them in water currents to move food and mucus.

What is a Cnidocyst? A Cnidocyst is the stinging cell or nematocyst of a cnidarian.

What are Crustaceans? A diverse group of arthropods (animals with jointed limbs and hard exoskeleton) such as crabs, lobsters, shrimps, and barnacles.

What is the definition of Dentition? Dentition refers to the arrangement or physical condition of the teeth in a particular species.

What is the definition of Detritus? Detritus means non-living particulate organic material. Fragments of dead organisms, including fecal and decomposed sediment, are called detritus.

What is the definition of Dimorphism? Sexual dimorphism is the strikingly obvious observable different characteristics between males and female genders of the same species.

Where is the Dorsal Fin of a fish? One of the unpaired fins found on the back of the fish's body.

What is Epidermis? The epidermis is the outermost layer of skin.

What is the meaning of Extant? Extant means it is still in existence or surviving.

What is the meaning of Gametes? Gametes are mature male or female germ cells that unite with others of the opposite sex in sexual reproduction.

What is the meaning of Gonochoristic? Gonochorism or gonochoristic in biology indicates that an organism has unisexualism. It describes the state of having only one of two or more distinct sexes.

What is the meaning of Hermaphrodite? Hermaphrodites are animals having both male and female sex organs. They may also display other sexual characteristics of both genders.

What is the definition of Heterotrophic? Heterotrophic describes most animals that require organic compounds of carbon and nitrogen for nourishment.

Mammalian Dive Reflex

It has several aliases, such as diving bradycardia and the diving response. But, what does the mammalian diving reflex do and why is it important for deep-diving freedivers?

In simple terms, it is a physiological reaction that mammals and humans have in response to submersion in water - especially cold water. This automatic, protective action results in certain body parts shutting down to conserve energy (e.g. for survival).

What are Mollusks? A group of marine invertebrates such as snails, slugs, shellfish, octopuses and squid.

What is Mucus used for? A sticky secretion used for locomotion, lubrication or protection from foreign particles.

What does Nocturnal mean? Nocturnal means being active at night time.

What is a Notochord? A notochord is a stiff rod of tissue along the back of the body.

What is the definition of Operculum? The operculum is a lid-like plate which covers or often closes an aperture such as gill covers.

What is the definition of Osculum? The main opening through which filtered water is discharged found in sponges.

Where might you find a fish's Pectoral Fins? The pair of fins found on each side of a fish's body just behind the gills used for balancing and braking.

Planula Larva

Planula larva (planulae for plural) is usually a free-swimming larval form that is common in most species of the phylum Cnidaria. Typical examples include coral, jellyfish, and sea anemones).

In most cases, the planula body is cylindrical in shape, although some are egg-shaped. They use cilia (tiny hairlike projections) for movement or locomotion.

In fact, it is the polyp form in sea anemones and some anthozoans (including the medusa form in most of the cnidarians (coelenterates) that produce planulae.

What is the definition of Sedentary? Sedentary describes the way in which particular animals feed. Sedentary filter feeders strain particles or small organisms out of the water column by circulating them through its system.

What is Symbiosis? A symbiotic interaction is a close and often long-term relationship between two or more different biological species. An example would be the symbiosis between the goby fish and the burrowing shrimp.

What are Tentacles? Appendages which are flexible found in cnidarians and molluscs.

What is the meaning of Zooid? Zooid means that animals or new individuals arise from the budding or division of other organisms within the colony.

What is Zooplankton? Plankton consisting of small animals and the immature stages of larger animals. Check our zooplpankton facts and information for more interesting anecdotes.

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