- Scientific name: Tetraodon fluviatilis
- Common name: Green pufferfish, Spotted green puffer, Spotted river puffer, Round spotted puffer
- Group: Brackish fishes
- Habitat: Southeast-Asia.
- Size: 15 cm
- Biotope: In coastal fresh and brackish waters in Asia and Southeast Asia.
- Social behavior: Young individuals are usually peaceful. Older specimens are territorial and aggressive. All ages are aggressive towards their own, and similar species. Best kept alone, but can be combinedin a community tank, with hardy, brackish fish of similar sizes. This Puffer will attack plants and may nip thefins of other fish. Males may fight to the death, so monitor fights closely.
- Diet: Live, snails, Tubifex , crustaceans, insect larvae, earthworms, occasionally tablets
- Breeding: Breeding is very difficult and is unusual.
- Tank: Minimum 200 litres
- Population: 2 fishes for 200 litres
- Decoration: The substrate should be fine gravel or, preferably sand. The tank should be well-planted along the sides and rear and an open swimming area should be left. The plants used must be tough to withstand this Puffer's pugnacious behavior, and must be able to tolerate brackish water. Use rocks and wood to create refuges.
- Temperature: 24-28 °C
- pH: 7,5-8
- Hardness: 11-20NK°
- Salinity: 2-5%
- Lifespan: 15 years
Description: Very thick set and shaped like a blunt club. They have protruding eyes and a very broad forehead. The Caudal fin is fan shaped and there are no Ventral fins. The body is somewhat covered with small spines and the skin has a leathery texture.
The color is variable depending on age and the origin of the fish. In mature specimens the top and head area is marked with large Brown or Black spots. The spots on the side are smaller and also round in shape. The body color between the spots is a beautiful Emerald Green color which makes a nice contrast to the dark spots. The bright Green color is subdued in younger specimens. The fins are semi transparent with a slight Yellow tint to them.
The most recognizable trait of the Puffer is its' ability to inflate a sac like area of the gut with water or air to inflate themselves into the shape of a ball. Most puffers are undemanding in their care and many of the Brackish species can be acclimated to hard, alkaline water fresh water. Tetraodon nigroviridis is one of these species. They are not hard to feed and usually will accept all types of flake, frozen and live food. In the wild they feed on small mollusks and invertebrates. The Green puffer will come to recognize its owner and will get excited when you approach. The tank setup should contain plants and rockwork for hiding as well as open areas for swimming. They are best kept singly or with other large tough fish.
Not a lot is known of their breeding and it probably can only be accomplished in Brackish water. During courtship the pair will swim around each other just above the bottom of the tank. Pale clear eggs are laid tightly packed on rock surfaces. The male will protect the brood and uses his body to cover the eggs. The eggs hatch in about a week and the male will transfer the tadpole like fry to shallow pits and continue to guard them. The fry can be hard to raise and feeding them can be difficult, you should try a variety of small food including Brine shrimp nauplii and observe which type they are eating. The mortality rate on the spawn is usually high.
(Variegated platy )
(Flower horn fish)
(Cuckoo Synodontis, Multi-spotted synodontis )
(Scat, Spotted scat)