🐾 Pets Alpha
🐠 Fish Species Guide

Platy Fish

The easiest beginner fish — colorful, peaceful, and producing fry faster than you can rehome them. Those endless color combinations, that chunky little body, that peaceful nature that makes them the perfect community fish. Complete guide: the Platy vs Molly vs Swordtail differences, the "Mickey Mouse" marking, and why you'll start with 3 and have 30 within 3 months.

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📋 Species Overview

Scientific Name
Xiphophorus maculatus
Lifespan
3 – 5 years
Size
5 – 7 cm
Min. Tank
38 L / 10 gal
Temp/pH
22-26°C / 7.0-8.5
Livebearer?
YES (Fry Every Month!)

🐟 Platy vs Molly vs Swordtail — Quick ID

FeaturePlatyMollySwordtail
Size5-7 cm (smallest)5-12 cm (varies)8-15 cm (largest)
Body ShapeDeep, chunky, compactElongated, slenderElongated, male sword tail
Brackish?Pure freshwater ONLYThrives in brackishPure freshwater ONLY
HardinessVery hardy ✅Less hardy (shimmies)Hardy ✅
BeginnerBEST choice ⭐Good (brackish = better)Good (needs more space)

🎨 Color Varieties

Platies come in virtually every color — red, orange, yellow, blue, green, black, white, gold, and every combination. Popular patterns: Mickey Mouse (three spots at the tail base forming a Mickey Mouse silhouette), Wagtail (black fins on a colored body), Tuxedo (black rear half, colored front half), Sunset/Hawaiian (multicolored mix), and Panda (black and white).

👶 Breeding — Endless Babies

Like Mollies, Platies are livebearers — 20-50 fry every 4-5 weeks. 1 male : 2-3 females recommended. Fry hide in floating plants and eat crushed flake, baby brine shrimp, or commercial fry food. Population control: have a plan for the fry — other community fish will eat most of them, or you'll need to rehome dozens of juvenile Platies monthly.

CategoryCost (USD)
🐟 Platy $3-$8 | 🏠 38L Setup $80-$200 | Total: $100-$230