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Aplocheilus blockii

Green Panchax

Arnold, 1911Formerly Haplochilus panchax blockii Arnold, 1911 · Aplocheilus blochii Arnold, 1911

Last revised 2013Edit this page

On this page9 sections
Wild specimen collected in the vicinity of Chennai, Tamil Nadu state, southern India.
Wild specimen collected in the vicinity of Chennai, Tamil Nadu state, southern India.Beta Mahatvaraj

Quick factsEdit

Max size
45mm SL1.8in SL
Aquarium size
45 × 30cm18 × 12in
Temp
20–28°C68–82°F
pH
6.0–8.5
Hardness
5–20dGH

Difficulty5 of 8 measures

Easy

How the rating is worked out

Space
medium tank
Water
flexible
Temp
flexible
Diet
unknown
Temperament
unknown
Social
needs to be in a group
Compatibility
fine with others

Other demands

Each of these can raise the rating on its own, whatever the measures above say.

Hardiness
unknown

The green panchax, Aplocheilus blockii, is a small killifish from Sri Lanka and southern India, growing to around 45 mm SL. Euryhaline, it mostly inhabits lowland, often coastal, still or slow-moving brackish or fresh water with surface vegetation or overhanging cover, and is commonly found in mangrove swamps and rice paddies.

Etymology

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Aplocheilus: from the Greek απλός (apló) meaning 'simple, plain', and χείλος (cheílos), meaning 'lip'.

blockii:

Distribution

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Native to Sri Lanka and southern India with records in the latter existing from the states of Goa, Kerala, Tamil Nadu, and more recently, Karnataka.

Reports from Pakistan may be erroneous while the species's distribution in certain parts of the Western Ghats mountains in India requires confirmation.

Type locality is given simply as 'Sri Lanka'.

This species is euryhaline and mostly inhabits lowland, often coastal, habitats containing still or slow-moving brackish or freshwater.

It displays a preference for habitats with surface vegetation or overhanging cover and is commonly found in mangrove swamps and rice paddies.

Aquarium size

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Standard length
45mm SL1.8in SL
Aquarium base
45 × 30cm18 × 12in
Volume
~41litres~11US gal

Minimum base dimensions of 45 ∗ 30 cm18 ∗ 12 in or equivalent are recommended.

Water conditions

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Temperature
20–28°C68–82°F
pH
6.0–8.5
Hardness
5–20dGH

These recommendations come from this profile’s own figures. They contain affiliate links, so we may earn a commission.

Aplocheilus spp. are surface-dwelling predators preying on both aquatic and terrestrial invertebrates.

In the aquarium they will learn to accept dried foods in most cases but should also be offered regular meals of small live or frozen fare such as Artemia, Daphnia, chironomid larvae (bloodworm), etc.

Reproduction

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Not difficult. This species will deposit eggs in woollen mops, fine-leaved plants or mosses, or filamentous algae depending on what is available.

Incubation is 10-15 days and the fry will initially require infusoria-grade food until large enough to accept Artemia nauplii, microworm, etc.

References

  1. Riehl, R. and H.A. Baensch (1997). Aquarium Atlas. Volume 1, 6th Edition. Microcosm, 1-992