Benthic fish species

5-Other_Demersel_fishes-(P)-Monkfish--(copyright-Hreidar_Th_V)

Other demersal fishes

Atlantic catfish

Photo: Erlendur Bogason

Monkfish

Photo: Hreiðar Þór Valtýsson

The main demersal fishes harvested in Icelandic waters are the codfishes, flatfishes and redfishes, all described separately. Five other species that do not fit into these orders are of considerable commercial importance. These are the lumpsucker, monkfish, great silver smelt and the two catfish species, spotted catfish and Atlantic catfish. The third species of catfish, Northern catfish (Anarhichas denticulatus) lives in the cold deep waters north of Iceland, but this species is not edible due to its jellylike flesh.

5-Other_Demersel_fishes_&_5_Atlantic_catfish-(P)-Atlantic_catfish--(copyright-Erlendur_B)Some other benthic fishes have been harvested in the past or are still fished in low amounts. The orange roughy (Hoplostethus atlanticus) is found in concentrations in some deep waters W, SW, S, and SE of Iceland. It is occasionally caught as bycatch in other deep water fisheries. Concentrations were found in 1991 and the catch reached a peak of 715 tonnes in 1993. After that the catches declined and have virtually ceased. The orange roughy is a very valuable fish and is special among the exploited species around Iceland since it has a global distribution. Valuable orange roughy fisheries are, for example, conducted off Australia and New Zealand. A few tonnes of Black scabbard fish (Aphanopus carbo) and Aggassiz´ smooth head (Alepocephalus agassizii) have also been reported in some years.


Prey selection by two benthic fish species in a Mato Grosso stream, Rio de Janeiro, Brazil.(texto en inglês): An article from: Revista de Biologîa Tropical
Book (Universidad de Costa Rica)

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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