What is in Sea Water?

What is in Sea Water?

Brands
The strength of salt in the water averages around 3.5%, being weaker around ice caps and stronger in land-locked areas. The concentration in the Dead Sea and Red Sea areas for example is much higher, around a whopping 40%.
Classifying Fishes: Taxonomy

Classifying Fishes: Taxonomy

Coldwater Fish
Five "orders" make up 95% of the fishes in the freshwater aquarium hobby. They are the Cypriniformes, the Characiformes, the Siluriformes, the Cyprinodontiformes and the Perciformes.
Lords of the Sea: The Common Cachalot - Sperm Whale

Lords of the Sea: The Common Cachalot - Sperm Whale

Knowledge
Sperm whales can live up to 75 years and are currently considered a 'vulnerable' species on conservation lists. There were over 2 million Sperm Whales a century ago, but the population has dwindled to less than 250,000 in modern times.
Setting up a Marine Aquarium | OATA Video Guide

Setting up a Marine Aquarium | OATA Video Guide

Knowledge
To browse the full range of OATA care sheets for all species of tropical and coldwater fish, as well as guides for setting up aquariums and garden ponds please click here.
Keeping Marine Fish Successfully | OATA Video Guide

Keeping Marine Fish Successfully | OATA Video Guide

Knowledge
To browse the full range of OATA care sheets for all species of tropical and coldwater fish, as well as guides for setting up aquariums and garden ponds please click here.
OATA Care Guide: Discus

OATA Care Guide: Discus

Care Sheets

OATA produce a good range of free care sheets for coldwater, tropical freshwater and marine fish as well as for invertebrates, aquatic reptiles and plants. Discus belong to the genus Symphysodon and are held in the highest regard among fish keepers and by some as the ultimate freshwater tropical species.

OATA Care Guide: Clownfish Damsels Chromis and Basslets

OATA Care Guide: Clownfish Damsels Chromis and Basslets

Care Sheets

OATA produce a good range of free care sheets for coldwater, tropical freshwater and marine fish as well as for invertebrates, aquatic reptiles and plants. This group are small reef fish. The damsels, chromis and clownfish belong to the family Pomacentridae. The basslets belong to the family Grammatidae.

OATA Care Guide: Blennies Gobies Jawfish Dartfish Dwarf Wrasse

OATA Care Guide: Blennies Gobies Jawfish Dartfish Dwarf Wrasse

Care Sheets

OATA produce a good range of free care sheets for coldwater, tropical freshwater and marine fish as well as for invertebrates, aquatic reptiles and plants. This group of fish includes the gobies, dartfish, blennies, jawfish and dwarf wrasse. They all have similar requirements of aquarium conditions.

OATA Care Guide: Butterflyfish and Tangs

OATA Care Guide: Butterflyfish and Tangs

Care Sheets

OATA produce a good range of free care sheets for coldwater, tropical freshwater and marine fish as well as for invertebrates, aquatic reptiles and plants. The Butterflyfish are often one of the most sought after marine species and belong to the family Chaetodontidae, of which there are 90 species.

OATA Care Guides: Marine Dwarf Angelfish

OATA Care Guides: Marine Dwarf Angelfish

Angelfish

OATA produce a good range of free care sheets for coldwater, tropical freshwater and marine fish as well as for invertebrates, aquatic reptiles and plants. In the wild, this group of fish are found in tropical seas including the Pacific and the Caribbean and there are more than 30 species