Tag Archive: catishes. freshwater fishes

Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii (ray-finned fishes)
Order: Siluriformes (Catfish)
Family: Callichthyidae (Callichthyid armored catfishes)
Subfamily: Corydoradinae (Cory)

Genus/species: Corydoras sterbai

GENERAL CHARACTERISTICS: The head has light spotted markings over a dark background. As part of the armored catfish group they possess two rows of bony plates running along the flanks instead of scales.

Length up to 6.5cm (2.6 inches)

DISTRIBUTION/HABITAT: Central Brazil, Bolivia. Fresh water benthic (bottom dwellers) in creeks, pools and flooded forest.

HABITAT: The Sterbas Cory is a fresh water bottom dweller.

DIET IN THE WILD: invertebrates, detritus (minimum algae)

REMARKS: C. sterbai like all Corys are facultative air breathers, gulping air in oxygen-poor waters absorbing it through its highly vascularized intestine.

They have sharp pectoral fin spines, which can also produce a painful sting.

IUCN: Not Evaluated


California Academy of Sciences Steinhart Aquarium Flooded Amazon 2018

Ron’s flickr http://www.flickr.com/photos/cas_docents/5356076486/in/set-72157625825649576/

Fishbase. www.fishbase.org/summary/Corydoras-sterbai.html

Serious Fish www.seriouslyfish.com/species/corydoras-sterbai/

Ron’s WordPress Shortlink  http://wp.me/p1DZ4b-18N


Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii (Ray-finned fishes)
Order: Siluriformes (Catfishes)
Family: Doradidae (Thorny catfishes)

Genus/species: Oxydoras niger

GENERAL CHARACTERISTICS:  A stocky brown catfish with three pairs of barbels.  Like all members of their family, have bony plates that protect the head and hook-like scutes that run along the lateral line. The Scutes on the O. niger are sharp and can cause significant lacerations.

Length up to 1 m (3.3 ft) in length and weigh up to 14 kg (30 lbs)

DISTRIBUTION/ HABITAT: South America: Amazon and possibly Orinoco River basins. Occur over mud in streams and lakes.

DIET IN THE WILD: The Ripsaw Catfishes large mouth creates a suction to vacuum up detritus, insect larvae, crustaceans, and plant material. When the forest is flooded, they feed exclusively on seeds and fruit.

REPRODUCTION: Sexes separate. Fertilization is external. Adults are non-guarders.


REMARKS: Members of the family Doradidae are known as “talking catfishes” as they make a strange, creaking noise when removed from the water., a sound produced by movement of the pectoral spine within its socket and amplified by the swim bladder.


California Academy of Sciences Steinhart Aquarium Amazon Flooded Tunnel 2018

Animal Diversity Web ADW animaldiversity.ummz.umich.edu/accounts/Oxydoras_niger/

 fishbase www.fishbase.org/summary/Oxydoras-niger.html

 Ron’s flickr https://www.flickr.com/photos/cas_docents/6181844571/in/set-72157620568438047/

Ron’s WordPress Shortlink  http://wp.me/p1DZ4b-96



Phylum: Chordata
Class: Actinopterygii (ray-finned fishes)
Order: Cypriniformes ( carps, minnows, loaches and relatives)
Family: Balitoridae (hillstream river loaches)

Genus/species: Sewellia lineolata

Hillstream Loach  IMG_0740

GENERAL CHARACTERISTICS: Sewellia spp. are perhaps the most dominant of the ‘sucker belly’ group of loaches. Sides of body with 3-5 bold longitudinal stripes. Pectoral fin with bold submarginal stripe, otherwise with reticulated marks. Pelvic fin with 3 bold stripes. Females plumper than males. Males have raised areas like small “fences” on first few rays of pectoral fins, and when viewed from above are noticeably “squarer” in the area of the front leading edge of the pectoral fins. Maximum size: 2.5 inches

DISTRIBUTION/HABITAT: China, Viet Nam, Cambodia. Known from the Mekong basin. Found in shallow, fast-flowing rivers, highly oxygenated headwaters and tributaries with substrates of composed of bedrock, sand and gravel.

Hillstream Loach  IMG_0739

DIET: Algae plus associated micro-organisms although insect larvae are probably taken on an opportunistic basis.


REMARKS: Paired fins are orientated horizontally, head and body flattened and the last two pelvic-fin rays combine with a fleshy flap on the base of the fin to form a ‘pelvic valve’ forming a powerful sucking cup which allowing the fish to cling tightly to solid surfaces in rapid moving streams.

Waterplanet, senses cluster

flickr http://www.flickr.com/photos/cas_docents/sets/72157625017923579/

WordPress Shortlink http://wp.me/p1DZ4b-1aa

Ref: fish base, EOL, Seriously Fish.

Kingdom: Animalia (animals)
Phylum; chordata (chordates)
Subphylum: Vertebrata (vertebrates)
Superclass: Osteichthyes (bony fishes)
Class: Actinopterygii (ray-finned fishes)
Order: Siluriformes (Catfish)
Family: Ictaluridae (North American freshwater catfishes)

Genus/species: Ictalurus punctatus 

Channel Catfish 4814480548_07a4554eb4_b

GENERAL CHARACTERISTICS: Color varies from blue, black, olive; speckled above, lighter below, with males generally darker than females. Like all catfish, are scaleless. Two barbels in upper jaw,four below, keel like adipose fin and a forked tail. Size to 24 inches and weight to 13 kg (28.6 lbs).

DISTRIBUTION/HABITAT: North America: Central drainages of the United States to southern Canada and northern Mexico. Found in rivers and streams, ponds and reservoirs, especially on sand or gravel bottom near rocks or logs where they hide during the day.

DIET IN THE WILD: Olfactory sensors on barbels and the body. Omnivorous eating small fish, crayfish, clams and snails; also feed on aquatic insects and small mammals.

REPRODUCTION: Monogamous. Mate once a year, males guard nest. Farmed world-wide as a food source.

REMARKS: Albino form common in the aquarium trade.
Farmed world-wide as a food source.

Waterplanet Feeding Cluster and Swamp SW02

flickr  http://www.flickr.com/photos/cas_docents/sets/72157608608528651/with/4814480548/

WordPress Shortlink  http://wp.me/p1DZ4b-110


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