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Saxatilia proteus

Proteus Pike Cichlid

(Cope, 1872)Formerly Crenicichla proteus

Last revised 2026Edit this page

On this page10 sections

Quick factsEdit

Max size
150mm SL6in SL
Aquarium size
120 × 38cm48 × 15in
Temp
24–27°C75–81°F
pH
6.0–7.0
Hardness
0–15dGH

Difficulty3 of 8 measures

Moderate

How the rating is worked out

Space
large tank
Water
needs a steady pH
Temp
needs a steady temperature
Diet
unknown
Temperament
unknown
Social
unknown
Compatibility
unknown

Other demands

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

Hardiness
unknown

The Proteus pike cichlid, Saxatilia proteus, is one of the smaller pike cichlids, known from Ecuador, Peru and Brazil. It is occasionally offered for sale and more than makes up for its size in aggression, especially towards conspecifics. It will eat any fish small enough to be considered food, so suits a tank of larger cichlids or a species-only set-up.

Distribution

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Ecuador, Peru and Brazil. In Ecuador it's known from the Rio Napo and Rio Putumayo. In Peru it's range extends from the Rio Ucayali to the Rio Pebas. Populations have also been recorded from the Rio Purus in Brazil.

Well planted shallows.

Aquarium size

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Standard length
150mm SL6in SL
Aquarium base
120 × 38cm48 × 15in
Volume
~137litres~36US gal

120 ∗ 38 ∗ 30 cm48 ∗ 15 ∗ 12 in - ~137 litres~36 US gal

Maintenance

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Sand substrate is recommended. This species is likely to dig and arrange the decor to suit itself. Some rockwork should be provided to form caves as pikes like to have an area to which they can retreat. Plants should be robust, ideally potted or rooted to bogwood.

Water conditions

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Temperature
24–27°C75–81°F
pH
6.0–7.0
Hardness
0–15dGH

Temperature: 24 – 27 °C75 – 81 °F

pH: 6.0 - 7.0

Hardness: Up to 15°H

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

Feed a varied diet including a good quality cichlid pellet or flake, live or frozen foods, such as bloodworm or brineshrimp and vegetable matter in the form of spirulina or algae wafers.

Behaviour and compatibility

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Can be aggressive, especially towards conspecifics. may be kept with other larger cichlids or as a species only setup. Likely to eat any fish small enough to be considered food - and they have big mouths!

Sexual dimorphism

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Male is larger and likely to be more prominently marked.

Reproduction

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Has not been bred in the hobby.

Notes

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Saxatilia proteus is occasionally offered for sale. It is one of the smaller pike cichlids, although more than makes up for that in terms of aggression!