Lined Seahorse tank mates
Hippocampus erectus
5 rated pairings from the Lined Seahorse care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Lined Seahorse needs at least 30 gallons on its own; every companion adds to that.
Excellent matches
1 · Same water, complementary zones, no conflict.Good matches
4 · Compatible with normal care — watch space and numbers.Ocellaris Clownfish
Amphiprion ocellaris
20 gal min · 3.5" adult · Semi-aggressive
Peaceful reef fish with similar saltwater requirements; avoid aggressive clownfish species
Neon Goby
Elacatinus oceanops
20 gal min · 2" adult · Peaceful
Small, non-aggressive bottom dweller that won't compete for food or harass seahorses
Yellow Watchman Goby
Cryptocentrus cinctus
30 gal min · 3.5" adult · Peaceful
Peaceful goby that stays in lower water column; minimal interaction with seahorses
Peppermint Shrimp
Lysmata wurdemanni
20 gal min · 2" adult · Peaceful
Small, peaceful shrimp that won't compete for mysis shrimp food sources
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.