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A single-access key (also called a sequential key or an analytical key), has a fixed structure and sequence. The user must begin at the first step of the key and proceed until the end. A single-access key has steps that consist of two mutually exclusive statements (leads) is called a dichotomous key. Most single-access keys are dichotomous. [3]
Hemitaurichthys zoster, commonly known as the brown-and-white butterflyfish, black pyramid butterflyfish, zoster butterflyfish, or brushtooth butterflyfish, is a marine ray-finned fish, a butterflyfish belonging to the family Chaetodontidae native to the Indian Ocean.
A school of false Moorish idols, Heniochus diphreutes. Butterflyfish mostly range from 12 to 22 cm (4.7 to 8.7 in) in length. The largest species, the lined butterflyfish and the saddle butterflyfish, C. ephippium, grow to 30 cm (12 in).
Chaetodon is a tropical fish genus in the family Chaetodontidae. Like their relatives, they are known as "butterflyfish". Like their relatives, they are known as "butterflyfish". This genus is by far the largest among the Chaetodontidae, with about 90 living species included here, [ 1 ] though most might warrant recognition as distinct genera.
Foureye butterflyfish usually frequent shallow inshore waters, where they feed on a variety of invertebrates, mainly zoantharians, sea anemones, scleractinians, [6] polychaete worms, gorgonians, tunicates, crustaceans and fish eggs. [7] This fish is known for its uncanny ability to swim in and around coral heads and reefs.
In phylogenetics, a single-access key (also called dichotomous key, sequential key, analytical key, [1] or pathway key) is an identification key where the sequence and structure of identification steps is fixed by the author of the key. At each point in the decision process, multiple alternatives are offered, each leading to a result or a ...
The Japanese butterflyfish is a deep-bodied, vertically flattened fish up to 15 cm (6 in) long. The dorsal fin has 12 or 13 spines and 18 to 20 soft rays while the anal fin has 3 spines and 15 or 16 soft rays. The body is creamy-brown, rimmed with dark brown.
The Indian butterflyfish has a scattered distribution across the Indian Ocean and has been recorded from the Cocos (Keeling) Islands and Christmas Island in Australia, the Maldives Islands, Mauritius, Réunion, Amirante Islands and Cosmoledo Island in the Seychelles and the Chagos Archipelago in the British Indian Ocean Territory.