Oscar tank mates

Astronotus ocellatus · Fish · 16" · Aggressive · needs 75+ gal, 74–81°F, pH 6–8 buy at Flip Aquatics · Flip Aquatics live-arrival guarantee

Compatible (27)

• Thai Micro Crab (crab, 0.4")
• Giant Gourami (fish, 24")
• Assassin Snail (snail, 1")
• Batik Nerite Snail (snail, 0.6")
• Bladder Snail (snail, 0.5")
• Blue Mystery Snail (snail, 1.8")
• Colombian Ramshorn (snail, 2")
• Gold Mystery Snail (snail, 1.8")
• Horned Nerite Snail (snail, 0.5")
• Ivory Mystery Snail (snail, 1.8")
• Japanese Assassin Snail variant (snail, 1")
• Japanese Trapdoor Snail (snail, 2")
• Malaysian Trumpet Snail (snail, 1")
• Mystery Snail (snail, 2")
• Nerite Snail (snail, 1")
• Olive Nerite Snail (snail, 0.75")
• Pagoda / Spiky Snail (snail, 1.5")
• Pond Snail (snail, 2")
• Rabbit Snail (snail, 3")
• Ramshorn Snail (snail, 1")
• Red Racer Nerite (snail, 0.8")
• Red Racer Nerite Snail (snail, 0.75")
• Spike-Topped Apple Snail (snail, 1.5")
• Spiky Nerite (snail, 0.7")
• Sulawesi Snail (snail, 2")
• Tracked Nerite Snail (snail, 0.8")
• Zebra Nerite Snail (snail, 1")

Usually fine — light caution (2)

• Pom Pom Crab (crab, 1")
• Dwarf Crayfish (CPO) (crayfish, 1.75")

Caution — only with care (8)

• Panther Crab (crab, 3")
• Blue Lobster Crayfish (crayfish, 5")
• Brazos Dwarf Crayfish (crayfish, 1.5")
• Cajun Dwarf Crayfish (crayfish, 1.5")
• Electric Blue Crayfish (crayfish, 5")
• Marbled Crayfish (crayfish, 5")
• Typhoon Pleco (fish, 12")
• Giant Sulawesi Snail (snail, 3")

Avoid (117)

These will likely eat, be eaten by, or seriously stress Oscar.

• Altum Angelfish (fish, 7")
• Angelfish (fish, 6")
• Banded Kuhli Loach (fish, 4")
• Betta (Siamese Fighting Fish) (fish, 2.5")
• Black Kuhli Loach (fish, 3")
• Black Molly (fish, 4")
• Black Neon Tetra (fish, 1.5")
• Black Skirt Tetra (fish, 2.5")
• Blue Gourami (fish, 6")
• Blue Phantom Pleco (fish, 7")
• Bolivian Ram (fish, 3.5")
• Brilliant Rasbora (fish, 4")
• Bristlenose Pleco (fish, 5")
• Bronze Cory (fish, 2.75")
• Candy Striped Pleco (fish, 4")
• Cardinal Tetra (fish, 2")
• Cherry Barb (fish, 2")
• Chili Rasbora (fish, 0.7")
• Chocolate Gourami (fish, 2")
• Clown Pleco (fish, 3.5")
• Clown Rasbora (fish, 4")
• Colombian Zebra Pleco (fish, 3.5")
• Common Pleco (fish, 24")
• Croaking Gourami (fish, 3")
• Discus (fish, 8")
• Dwarf Cory (Habrosus) (fish, 1")
• Dwarf Gourami (fish, 3.5")
• Ember Tetra (fish, 0.8")
• Emerald Cory (Brochis) (fish, 3")
• Endler's Livebearer (fish, 1.2")
• False Rummy Nose Tetra (fish, 2")
• False Rummynose Tetra (fish, 2")
• Fancy Guppy (Female trio) (fish, 2.4")
• Flash Pleco (L204) (fish, 20")
• German Blue Ram (fish, 2.5")
• Gold Gourami (fish, 6")
• Gold Kuhli Loach (fish, 3.5")
• Green Neon Tetra (fish, 1")
• Guppy (fish, 2")
• Harlequin Rasbora (fish, 1.75")
• Honey Gourami (fish, 2")
• King Tiger Pleco (fish, 6")
• Koi Angelfish (fish, 6")
• Kribensis (fish, 3.5")
• Kuhli Loach (fish, 4")
• Lambchop Rasbora (fish, 1.25")
• Least Rasbora (fish, 0.8")
• Leopard Frog Pleco (fish, 4.5")
• Longfin Bristlenose Pleco (fish, 5")
• Molly (fish, 4")
• Moonlight Gourami (fish, 6")
• Neon Tetra (fish, 1.5")
• Noble Gourami (fish, 3")
• Opaline Gourami (fish, 6")
• Panda Cory (fish, 2")
• Pearl Gourami (fish, 4.5")
• Phoenix Rasbora (fish, 0.8")
• Pitbull Pleco (fish, 2.5")
• Platy (fish, 2.5")
• Pygmy Cory (fish, 1")
• Pygmy Rasbora (fish, 0.8")
• Red-Line Rasbora (fish, 1.75")
• Royal Pleco (fish, 17")
• Rubber Pleco (Rubbernose) (fish, 4.5")
• Rummynose Tetra (fish, 2")
• Sailfin Molly (fish, 5")
• Siamese Algae Eater (fish, 6")
• Siamese Algae Eater (fish, 6")
• Sparkling Gourami (fish, 1.5")
• Swordtail (fish, 5.5")
• Tail Spot Pygmy Cory (fish, 1")
• Thick-lipped Gourami (fish, 3.5")
• Three Spot / Blue Gourami (fish, 5")
• Tiger Barb (fish, 2.75")
• Variatus Platy (fish, 2.75")
• Wild Betta Splendens (fish, 2.5")
• Wild-Type Betta (fish, 2.5")
• Yucatan Molly (fish, 6")
• Zebra Danio (fish, 2")
• Zebra Pleco (fish, 3.5")
• Zebra Pleco (fish, 3.5")
• Amano Shrimp (shrimp, 2")
• Bamboo / Wood Shrimp (shrimp, 3.5")
• Black King Kong Shrimp (shrimp, 1")
• Black Rose Shrimp (shrimp, 1.5")
• Blue Bolt Shrimp (shrimp, 1")
• Blue Dream Shrimp (shrimp, 1")
• Blue Tiger Shrimp (shrimp, 1.2")
• Blue Velvet Shrimp (shrimp, 1")
• Carbon Rili Shrimp (shrimp, 1.5")
• Cardinal Shrimp (shrimp, 0.8")
• Cardinal Sulawesi Shrimp (shrimp, 0.8")
• Cherry Shrimp (shrimp, 1")
• Chocolate Shrimp (shrimp, 1")
• Crystal Red Shrimp (shrimp, 1")
• Flower Shrimp (shrimp, 2.5")
• Ghost Shrimp (shrimp, 1.5")
• Green Jade Shrimp (shrimp, 1")
• Mischling / Taiwan Bee (shrimp, 1")
• Oolong Shrimp (shrimp, 1.2")
• Orange Eye Blue Tiger Shrimp (shrimp, 1.2")
• Orange Rili Shrimp (shrimp, 1")
• Painted Fire Red Shrimp (shrimp, 1.5")
• Pinto Shrimp (shrimp, 1")
• Red Nose Shrimp (shrimp, 1.5")
• Red Rili Shrimp (shrimp, 1")
• Red Shadow Panda Shrimp (shrimp, 1.2")
• Shadow Panda Shrimp (shrimp, 1.2")
• Snowball Shrimp (shrimp, 1")
• Super Crystal Red Shrimp (shrimp, 1.2")
• Tangerine Tiger Shrimp (shrimp, 1")
• Tiger Shrimp (shrimp, 1")
• Vampire Shrimp (shrimp, 6")
• White Glove Shrimp (shrimp, 1.2")
• Wine Red Shrimp (shrimp, 1.2")
• Yellow King Kong Shrimp (shrimp, 1")
• Yellow Neocaridina Shrimp (shrimp, 1")