Australian east coast fish species

The Blue Devil is considered

"The Blue Devil is considered to be one of the most colourful and attractive fish species found along the east coast of Australia."

The Eastern Blue Devil Fish (Paraplesiops bleekeri) is also known as the Bleeker's Blue Devil Fish and is one of the most beautiful fish species in Australia's waters. It is a shy, secretive fish that is found inside caves and under ledges in inshore reefs in NSW estuaries and offshore waters from three to thirty metres. It occurs on the east coast from southern Queensland to Montague Island, but is most common in NSW from Sydney southwards to Ulladulla. Around Sydney it occurs in the more saline parts of estuaries, along the rocky coastline and around offshore islands.

They are fecund breeders, however juveniles are rarely seen. They are often solitary and are most active during the night however little is known about their diet. The Eastern Blue Devil Fish is a protected fish species in New South Wales, and there are heavy penalties for taking, selling or possessing them. This species is popular with divers and photographers because of its striking iridescent blue and yellow markings.

The Eastern Blue Devil Fish is most easily recognised by its banded pattern of blue and white strips on the body, blue spotted head, blue dorsal and anal fins and yellow caudal (tail) fin and base and pectoral fins. The pelvic fins and posterior dorsal and anal fins are elongated. When the blue devil fish spreads these fins they overlap, making the fish appear larger.

It is thought that the male defends a territory in a cave or overhang in order to attract a mate and will drive other males away. This fish is known to mate in spring. The breeding season for the Eastern Blue Devil is between the months of October and March. The species lays its eggs in a group or nest that is glued to the roof of a cave until they hatch. Free swimming larvae, approximately 4mm long, hatch from the eggs and settle around reef areas when they have grown to about 10mm. It grows to 40cm in length. This species is also known to reside in the same cave for long periods of times. There are a couple of individuals that have been observed in the same cave for over three years in locations such as Jervis Bay and Fish Rock off South West Rocks.

The Eastern Blue Devil Fish is very closely related to the Southern Blue Devilfish (Paraplesiops meleagris) that is found in the cooler waters of southern Australia (see right image).

Elsevier Priority areas for conservation of Western Australian coastal fishes: A comparison of hotspot, biogeographical and complementarity approaches [An article from: Biological Conservation]
Book (Elsevier)

Copper is also toxic to fish, especially

2002-04-04 03:51:43 by MeM

Goldfish. There are several vital dyes that are relatively safe for FRESHWATER fish with ich (I know nothing about saltwater fishes) that are sold in pet stores: methylene blue is very safe for fishes but kills plants. There is a more commonly used drug now, malachite green, which is safe for plants and fairly safe for most fishes. But I believe a few kinds of FW fishes have trouble with it.
If I remember right, you don't have to change the water after using M.G., it naturally breaks down. But you will after M.B., first because it stains the water a deep blue, second because of your plants

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