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From The Aquarium Wiki

Ptereleotridae, or Dartfish, are a group of marine fish belonging to the order Perciformes. There are 45 known species in this group.

	Common name	Difficulty	Maximum Size	Minimum Tank Size
Nemateleotris decora	Purple Firefish Goby Purple Dartfish Elegant Firefish Decorated Dartfish	Moderate	33 in7.62 cm	3030 gal113.562 liters 113,562.353 mL
Nemateleotris magnifica	Firefish Goby Orange Firefish Common Firefish Dartfish Red Fire Goby	Moderate	33 in7.62 cm	2020 gal75.708 liters 75,708.236 mL