Bay snook
Petenia splendida
Also known as Red bay snook, Giant cichlid, Tenguayaca
Care at a glance
- Temperature
- 77–86°F (25–30°C)
- pH
- 7.0–8.0
- Adult size
- 19.7 in (50 cm)
- Minimum tank
- 151 gal (570 L)
- Temperament
- Mostly peaceful
- Social behavior
- Solitary
- Swim level
- Middle
- Difficulty
- Medium
- Breeding
- Medium
- Rarity
- Common
- Origin
- Atlantic slope from the Grijalva to the Usumacinta systems in Mexico, Guatemala, and Belize, in lakes and slow lower river reaches over soft bottoms.
- Family
- Cichlidae
Overview
A single adult needs a tank of at least 570 liters at 25 to 30 C and pH 7.0 to 8.0. Provide open swimming room with wood or rock cover. Feed meaty foods and quality pellets, and avoid live feeder fish. It is a predator that eats smaller fish, but it is comparatively shy and not a territorial brawler.
In the wild
The bay snook lives on the Atlantic slope from the Grijalva to the Usumacinta systems in Mexico, Guatemala, and Belize. It occupies lakes and slow lower river reaches over soft bottoms. This is a large ambush predator with a specialized feeding style. It needs a big tank with open water and cover to lurk in.
Good to know
Petenia splendida was described by Gunther in 1862 and is the only species in its genus. It reaches about 50 cm and has highly protrusible jaws that shoot forward to engulf prey. Color ranges from wild green and silver to a leucistic red form sold as the red bay snook.
Did you know
Its telescoping jaws can extend to more than a quarter of its body length, letting it snatch prey from open water.
Where to buy
Some links may not be the exact species or variety.
- Imperial Tropicals Freshwater fish and inverts bred at a Florida hatchery
- The Wet Spot Tropical Fish Large freshwater selection from a longtime Portland fish store
…or ask your local fish store.
Appears in
Keeping Bay snook?
Track water tests, reminders and stocking fit.
Related species

Spilo
Champsochromis spilorhynchus15.7 in (40 cm)125 gal (475 L)75–81°F (24–27°C)
Blue zaire frontosa
Cyphotilapia gibberosa13.8 in (35 cm)119 gal (450 L)75–81°F (24–27°C)
Pantano cichlid
Cincelichthys pearsei11.8 in (30 cm)119 gal (450 L)77–86°F (25–30°C)
Severum
Heros efasciatus11.8 in (30 cm)65 gal (245 L)72–84°F (22–29°C)
Spotted Severum
Heros notatus11.8 in (30 cm)58 gal (220 L)72–84°F (22–29°C)
Venustus cichlid
Nimbochromis venustus11.8 in (30 cm)74 gal (280 L)75–82°F (24–28°C)
