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Introduction

Amphilophus flaveolus, also known as the Hogaboomorum Cichlid, is a cichlid native to Lake Apoyo in Nicaragua. This species belongs to the Midas cichlid group, known for its diversity and adaptations to Nicaragua’s crater lakes. Its robust body, large head and territorial behavior make it a fish best suited to experienced aquarists. In a spacious, well-structured aquarium with alkaline water, Amphilophus flaveolus can become a fascinating fish to observe. Adequate swimming space, rocky shelters and carefully planned tank mates are important for long-term success. It should not be treated as a standard community fish.

General description

Amphilophus flaveolus is a robust member of the Midas cichlid complex, adapted to the clear, alkaline waters of Lake Apoyo. It has a compact body, a proportionally broad head and a strong territorial nature. Like several cichlids in this group, it may defend a section of the bottom, particularly during breeding. Its care requires a large aquarium, efficient filtration and stable water quality. Coloration may change with age, mood and social status. The rarity value assigned to this profile is Very common, according to the catalogue scale. Even so, it is best regarded as a specialized cichlid rather than an ordinary community fish.

Geographical origin and biotope

The species comes from Nicaragua, specifically Lake Apoyo, a crater lake formed within an ancient volcanic caldera. The lake generally has clear, warm and alkaline water, with shores shaped by rocky areas, volcanic sand and accumulations of debris. Aquatic vegetation is not the main structural feature of the habitat; rocks, slopes and shelters are more important. The littoral zone provides feeding areas, territorial boundaries and places of refuge. In the aquarium, a firmly arranged rockscape is more appropriate than a densely planted layout.

Precise location and local name

Amphilophus flaveolus is associated with Lake Apoyo, in the Masaya region of Nicaragua. The lake is known for its endemic cichlids and for the remarkable diversification of the Midas cichlid group. The English common name Hogaboomorum Cichlid is used in aquarium literature and specialist profiles. Keeping this vernacular name is preferable to creating an artificial translation. In its native range, the species inhabits rocky littoral areas where underwater structure provides territorial boundaries and shelter.

Appearance and physical characteristics

Amphilophus flaveolus has a deep, compact and muscular body, with a broad head and a mouth suited to taking a variety of foods. Its outline resembles that of other Midas cichlids, although coloration may vary with age, sex, social rank and breeding condition. The dorsal and anal fins extend toward the rear, while the caudal fin supports quick movement among rocks. Individuals may show grayish-brown, pale or yellowish tones. The most noticeable features are the combination of a large head and territorial behavior, especially in dominant adults.

General diet

In the wild, Amphilophus flaveolus uses a varied diet that includes small invertebrates, animal and plant matter, and food items gathered from the substrate. In aquariums, offer quality cichlid pellets supplemented with frozen foods such as shrimp, krill or insect larvae. A vegetable component, such as spirulina or enriched pellets, can help maintain a balanced diet. Several small meals are preferable to one excessive feeding. The diet should remain varied and moderate to reduce obesity and protect water quality. Live foods may encourage natural hunting behavior, but they should not make up the entire diet.

Essential data

• Name of the originating river: Lago Apoyo
• Local name used: Hogaboomorum Cichlid
• Origin of the scientific name: Amphilophus is a genus name of Greek origin; flaveolus is a Latin term associated with a yellowish coloration.
• Etymology of the full name: Amphilophus approximately means “double-crested” or “with a double crest”; flaveolus means “yellowish” or “slightly yellow.”
• Common/vernacular names: Hogaboomorum Cichlid
• Family: Cichlidae
• Subfamily: Cichlinae
• Name pronunciation: am-fi-lo-fus - flah-vee-oh-lus
• Discovery: Jay R. Stauffer Jr., Michael H. McKaye and Erik van den Berghe, 2002
• Maximum adult size: About 15 cm
• Water temperature and pH: 24 to 29 °C; pH approximately 7.5 to 8.5
• Appearance of the waterway and surrounding vegetation: Clear crater lake, rocky volcanic shores and tropical terrestrial vegetation; aquatic vegetation is secondary.
• Typical tank mates: Amphilophus zaliosus, Amphilophus astorquii, Amphilophus xiloaensis, Amphilophus chancho
• Temperament and behavior: Territorial, vigorous and potentially aggressive, especially during breeding.
• Water depth: Shallow to moderately deep littoral areas
• Sexual dimorphism: Adult males may become larger and more heavily built; visual identification remains variable.
• Bottom structure and flow: Rocky or sandy volcanic substrate; lake water without pronounced current.

In your aquarium

To succeed with Amphilophus flaveolus, provide a spacious aquarium, warm alkaline water and filtration capable of handling the waste produced by a robust cichlid. Arrange rocks securely to create shelters and visual boundaries, and avoid unstable structures. Tank mates must be selected carefully because its territorial behavior may intensify with age or during breeding. A varied diet, regular water changes and close observation of behavior are the best foundations for keeping this cichlid healthy.