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blue-green Chromis

Scientific name Chromis viridis
Descriptor Cuvier
Year of description 1830
IUCN category (World) LC
Family Pomacentridae
Genus Chromis
Chromis viridis Chromis viridis
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Introduction

Chromis viridis, commonly known as blue-green Chromis, is a salt water fish.

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Who is it?

Morphology

  • Average size
    5 cm
  • Maximum size
    8 cm
  • Longevity
    4 year
  • Average size
    5 cm
  • Maximum size
    8 cm
  • Longevity
    4 year

How to recognize the blue-green Chromis ?

The blue-green Chromis measures around 5 cm. The dominant males can however reach 8 cm. The blue-green Chromis measures around 5 cm. The females are more imposing and some specimens can reach 8 cm. This fish is unicolore with a predominantly bleu body.

Sexual dimorphism

The female is bigger than the male.
The adult male is bigger than the female.

Behaviour & Life cycle

  • diet
    omnivorous
  • Sociability
    living in shoals
  • territorial
    Yes
  • Way of living
    diurnal

The blue-green Chromis is a fish living in shoals naturally found near the bottom. This species is omnivorous .

This species is territorial and does not appreciate the presence of intruders nearby, especially animals with similar behavior. However, the blue-green Chromis has little concern for non-territorial animals. In a constant quest for dominance, the dominant males of this species cannot stand each other. The battle between two individuals can be intense and violent. It will result in the submission and sometimes even death of one of the protagonists.

Reproduction

  • Reproduction
    ovipare qui pond sur substrat découvert
  • Hermaphrodite
    protogynous

The blue-green Chromis is a fish ovipare qui pond sur substrat découvert. always born female. Growing up, individuals will change sex to become male, this is called successive hermaphroditism of the protogynous type.

Harmless species

This species does not represent any particular threats to humans when encountered in its natural environment.

Where to find it?

Conservation status of populations (IUCN)

World : LC
France : NE

Where to see this species?

Aquarium de La Réunion Aquarium de Lyon Aquarium des Lagons Aquarium du Limousin Aquarium-Muséum de Liège La Cité de la Mer Nausicaa Oniria Planet Ocean Montpellier aquarium-tropical

What is its habitat?

Natural environment characteristics

  • Temperature
    22 - 28 °C
  • Depth
    0 - 15 m
  • Flow
    Medium

Biotope presentation

The blue-green Chromis is most often found at a depth between 0m and 15m. However, it is not impossible to find this species at other depths.

Species of the same biotope

Main recommendations for fishkeeping

Deontology

In order to preserve wildlife, if you acquire this animal, it must not be released into the wild. See also, the Fishipedia charter.

Fishipedia supports the practice of responsible and environmentally friendly aquarium keeping. We encourage maintenance if it is motivated by a desire to understand the biological functioning of living things and if it is done with respect for animal life.

We believe that aquaristics is an opening to the discovery of aquatic environments, especially freshwater, and that this knowledge is necessary to better protect and respect these environments. Logically, we refute the compulsive purchase of animals that would not find a sufficient and / or adapted place in the host aquarium.

Our recommendations

  • Min volume
    200 liters
  • Population min
    1
  • Temperature
    22 - 28 °C
  • pH (acidity)
    8.2 - 8.4

Characteristics

  • Robustness
    robust
  • Behaviour
    slightly aggressive

General reminders

It is strongly advised to read the complete dedicated file and to get information on the feedbacks of maintenance of the envisaged animal, this to avoid any potential conflict whose end result is generally the death of the individual (or the other inhabitants). It is important not to overload your aquarium to limit pollution. This will make maintenance easier.

The realization of a seawater aquarium requires certain knowledge beforehand. Seawater is generally synthetic, consisting of reverse osmosis water and synthetic salt at a level of 33g / liters. It is also possible to take seawater directly (after making sure that the water is not polluted). The operation of a seawater aquarium is done in three phases: the installation of a living stone decoration, the introduction of invertebrates one month later, and the introduction of fish 3 months later. It is essential to wait as long as possible before to introduce the animals so that the micro-fauna has had time to develop well. The balance and the physico-chemical stability are fundamental for the success of this type of tank.

General reminder on maintenance datas

Le démarrage d'un aquarium est une partie primordiale pour l'équilibre et le bien-être des poissons. Lorsque l'on met en eau un aquarium, l'eau passe naturellement par un cycle biologique : le cycle de l'azote. Celui-ci dure environ trois semaines. Tous les 2 jours, nous vous conseillons de tester votre eau jusqu'à ce que le taux de nitrite soit à zéro pendant plusieurs jours d'affilée.

Pour accélérer ce cycle, vous pouvez utiliser un activateur de bactéries comme JBL Denitrol. Cette solution riche en bactéries vivantes et enzymes permet une mise en place rapide du cycle de l'azote. Les poissons peuvent alors être introduits plus rapidement.

Il est important de tester l'eau de son aquarium régulièrement pour maintenir un environnement sain pour les poissons et les autres habitants. Les tests d'eau permettent de mesurer les niveaux de différents paramètres tels que le pH, la dureté totale, ainsi que les taux de nitrates, de nitrites et d'ammoniaque.

Pour réaliser ces tests, vous pouvez utiliser des produits d'analyse spécialisés tels que JBL ProScan qui permet de réaliser un diagnostic de l'eau directement via un smartphone. Il existe également des coffrets de tests plus classiques de bandelettes, comme JBL PROAQUATEST.

En cas d’usage de l’eau du robinet, vous pouvez utiliser un conditionneur d’eau de type Biotopol de JBL pour éliminer les substances nocives comme le chlore, le cuivre, le plomb et le zinc. Les conditionneurs d'eau garantissent une meilleure santé aux poissons et une meilleure croissance des plantes.

Chlorine and chloramine are dangerous for the health of animals. Used to disinfect water, these agents are present in significant quantities in tap water. We recommend using an anti-chlorine agent every time you change the water. In addition to chlorine, treatments and medicines sold for aquarium use sometimes contain dangerous heavy metals in high doses.

Specific needs for the blue-green Chromis

The blue-green Chromis is a marine species which lives naturally at a temperature between 22 °C and 28 °C. For proper maintenance, the temperature should never exceed the 31°C for long periods. Nitrate levels should remain below 50mg/L. To keep the water clean and unpolluted, plan on changing 20% to 30% of the water volume each month. In seawater, it is also possible to remove nitrates using one of the following methods: Jaubert, denitrator on sulfur, biopeletts, vodka method.

Cohabitation & Environment

Being a living in shoals fish, it is advisable to install at least 1 individuals in an aquarium of 200 liters minimum (for 100 cm of frontage). Group maintenance is a prerequisite to ensure their well-being. Lonely individuals tend to quickly become stressed and become especially susceptible to disease.

The blue-green Chromis may show signs of aggression. In general, this species should not be mixed with large territorial species or other overly aggressive species, in order to avoid possible stress or even injury.

However, it can coexist with other species with a peaceful temperament and with some slightly territorial neighbors, as far as the volume of the aquarium allows. It is important to avoid that two territorial species share the same living area in an aquarium of insufficient volume.

The males of this species do not support each other, the maintenance of several of them in the same tank is strongly disadvised.

Tips for feeding

The blue-green Chromis is omnivorous.

This species can eat dry food (flakes, pellets), fresh food and frozen food. To avoid deficiencies, it is recommended to vary the types of food.

You should not overfeed your residents to avoid polluting the water. For most species, it is better to feed a few small portions each day rather than one large meal.

Reproduction protocol

  • Maintenance difficulty
    very hard
  • egg-laying protection
    Yes

Hybridization risks

In general, it is advised not to mix several species of the same genus or different varieties of the same species, to avoid the risks of hybridization.

These animals might interest you

To go further

Species of the same family

To read on the web

BioObs fishbase EOL

Sources & Contributions

Participation & Validation

The Fishipedia team and specialist contributors are committed to providing high-quality content. However, although the information comes from scientific sources or testimonials from specialists, the cards may contain inaccuracies.

Adrien Falzon

Adrien Falzon

Translation

Translation done with the valuable contribution of our translators, who make this information available to a wider audience. We sincerely thank them for their commitment.

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Template and content © Fishipedia - Unauthorized reproduction without prior request - ISSN 2270-7247 - Last modification 02/12/2023

Where to see this species?

Aquarium de La Réunion Aquarium de Lyon Aquarium des Lagons Aquarium du Limousin Aquarium-Muséum de Liège La Cité de la Mer Nausicaa Oniria Planet Ocean Montpellier aquarium-tropical

Scientific partners

UICN France fishbase Worms BioObs

Tags

#Pomacentridae

#Chromis

#barrière de corail

#lagon

#Bay of Bengal

#Great Barrier Reef

#mer d'Oman

#Tasman Sea

#Philippine Sea

#Red Sea

#South East Asian Seas

#Indonesian seas

#Western Tropical Pacific Ocean

#Bali

#Mauritius

#Réunion

#Lombok

#Nusa Penida

#French Polynesia

#Zanzibar Archipelago

Species of the same family

Same genus

Species of the same biotope

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