Fish Species Starting with G
Browse all aquarium fish species with scientific names beginning with "G". Each profile includes care requirements, water parameters, tank size recommendations, and compatibility information for freshwater, marine, and brackish species.
The letter 'G' features a diverse array of aquarium species ideal for various setups. Notable examples include the vibrant Royal Gramma (Gramma loreto), perfect for reef tanks, and the striking Violet Goby (Gobioides broussonnetii), known for its unique appearance. Whether you are interested in community fish like the Black Skirt Tetra (Gymnocorymbus ternetzi) or exploring unique specimens, this index offers a valuable selection for any aquarium enthusiast.
5 species found
Three-spined stickleback
Gasterosteus aculeatus
The three-spined stickleback is a small, armored fish with bony lateral plates and three prominent dorsal spines used for defense. Males become striking in breeding condition, often developing a red throat/belly and intensified coloration while they build and guard nests. It is highly active and behaviorally interesting, but can be nippy and territorial, especially during breeding.
European gudgeon
Gobio gobio
The European gudgeon is a small bottom-dwelling cyprinid with a slender body, sandy-brown mottling, and distinct barbels at the corners of the mouth used to locate food in the substrate. It is an active schooling fish that prefers well-oxygenated water and a sand or fine-gravel bottom, often resting on the substrate between foraging bouts. Best kept in cool, river-style aquariums with moderate flow rather than warm tropical setups.
Violet goby
Gobioides broussonnetii
This is the long, eel-y "dragon goby" you see at shops sometimes-looks scary with that toothy face, but it's actually a chill mud-and-sand sifter. In nature it hangs around muddy estuaries and river mouths, and that's the trick in aquariums too: soft sand, brackish-ish water, and food it can actually find (they're not great hunters).
Royal gramma
Gramma loreto
Royal grammas are that classic purple-to-yellow Caribbean basslet that likes to claim a cave and hover around it (sometimes totally upside-down under a ledge). They're usually chill with tankmates, but they can get spicy with other grammas/basslets/dottybacks if space is tight-give them rockwork and a "home" cave and they settle right in.
Black Skirt Tetra (Black Widow Tetra)
Gymnocorymbus ternetzi
Black skirts are those little "suit-and-tie" tetras with the dark bands and flowing fins that look way fancier than they should for how tough they are. They're super active midwater fish, and when you keep a proper group they do that tight, zippy schooling thing that makes the whole tank feel alive. Just give them enough buddies and finny tankmates they won't be tempted to nip.