The Rainbow Wolf Fish, Erythrinus erythrinus, ranges through Central America and into South America in the Orinoco and Amazon Drainages. It is also found in the coastal rivers of the Guianas. They are predatory and feed on fish, insects, and crustaceans. These fish are often exported for the aquarium trade. This specimen was photographed in the Peruvian Amazon 2010.
The Rainbow Wolf Fish, Erythrinus erythrinus, ranges through Central America and into South America in the Orinoco and Amazon Drainages. It is also...
|Tank Size||Approx 42x20x14" (105x50x35cm) (LxWxH)|
|Volume||Nominal: 35 imp gallons/42 US gallons/158 litres|
|Filtration||Built-in internal filter box, powered by Hagen Pro3 powerhead. There are triple pre-filtration sponges (course, medium, fine), and the main biomedia is highly porous Alfagrog rock.|
|Lighting||Low - fluorescent room lighting only.|
|Substrate||Thin layer of aquarium sand|
|Decor||Bogwood and artificial plant.|
|Background||3-D effect artificial background|
|Water parameters||Temp=26oC ; pH=6.8-7.0 ; GH=3 ; KH=2|
30% water change every week.
|Fish stock||Wolf fish (Hoplias malabaricus), female, currently 16"/40cm.|
|Feeding||Whitebait, Prawns, Mussel, Earthworms.|
The manner of which Atlantic wolffish fertilize their eggs distinguishes them from many fish. Instead of the female depositing her eggs in the open ocean for the male fish to fertilize and then continue on his way, they are internally fertilized and the male wolf-fish stays with the nest and protects the eggs for as long as four months, until the brood is strong enough to gain independence. Their eggs are 5.5–6 mm in diameter, (among the largest fish eggs known), yellow tinted and opaque. The eggs are laid on the ocean floor, many times in shoal water, sticking together in loose clumps, surrounded by seaweed and stones. Altantic wolf-fish mature relatively late, at age six.
Atlantic wolffish use their strong jaws to eat hardshell mollusks, crustaceans, and echinoderms. They do not eat other fish. They are known to frequently eat large welks, sea clams, large hermit crabs, starfish and sea urchins. They are an important predator of sea urchins, whose populations escalate rapidly and can negatively effect the health of a marine system.