Jellybeam

Mario encounters three Jellybeams

Jellybeams are a type of jellyfish enemies that appear in New Super Mario Bros. Wii. Their name is a pun on jelly bean, or a portmanteau of 'jellyfish' and 'beam'. They are only found in World 8-4 and serve to illuminate the dark waters. They are found along with Stone Spikes, Cheep-Cheeps, Deep-Cheeps, Bloopers, and Bulbers.

Jellybeams reappear in New Super Mario Bros. U acting in the same manner as in New Super Mario Bros. Wii appear only in Deepsea Ruins of Soda Jungle with Bulbers, Fish Bones and Circling Boo Buddies.

Despite helping Mario to see underwater, they can also hurt him if Mario touches them. Jellybeams can be defeated with fireballs or a Starman. Mario can also freeze them, causing them to stop moving, but they will continue to illuminate the water. Their movements can be compared to a Thwomp, although rather than slamming down on the ground when Mario approaches, automatically moves up and down slowly.

There is a very similar enemy named Jelectro that appears in Super Mario Bros. 3. The differences between the enemies is that the Jelectro is smaller, immobile, invincible, is black instead of blue, have dots unlike the Jellybeams, and doesn't glow.

Jellybeams are also seen in the underwater sections of the GCN Sherbet Land and Dolphin Shoals track in Mario Kart 8.

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[Edit] New Super Mario Bros. Wii
Playable characters	Mario • Luigi • Yellow Toad • Blue Toad
Supporting characters	Yoshi • Princess Peach • Toad
Bosses	Bowser Jr. • Koopalings (Larry Koopa · Roy Koopa · Lemmy Koopa · Wendy O. Koopa · Iggy Koopa · Morton Koopa Jr. · Ludwig von Koopa) • Magikoopa • Bowser
Worlds	World 1 • World 2 • World 3 • World 4 • World 5 • World 6 • World 7 • World 8 • World 9 • World Coin
Items and objects	? Block • ? Switch • 1-Up Mushroom • Arrow lift • Balance Lift • Barrel • Blue Coin • Bolt Lift • Brick • Chest • Cog • Coin • Current • Dark • Donut Block • Fire Flower • Flip Panel • Flower • Flying ? Block • Frozen Coin • Fruit • Glow Block • Half-circle rock • Hard Block • Hidden Coin • Hidden goal • Ice Block • Ice Flower • Ice Snake Block • Ice Wall • Invisible Block • Iron Block • Light Block • Limited Lift • Midway point • Mini Mushroom • Mushroom Platform • P Switch • Paddle wheel • Pendulum Platform • Penguin Suit • Pipe Cannon • Pole (goal) • Pole (object) • POW Block • Propeller Block • Propeller Mushroom • Quicksand • Red ! Switch • Red Block • Red Coin • Red Ring • Remote-Control Platform • Remote-Controlled Clown Car • Remote-Controlled Fence • Remote-Controlled Lift • Rolling log • Roulette Block • Sand Geyser • Screw • Screwtop Lift • Screwtop Platform • Screwtop Shroom • Sinking and Rising Mushrooms • Slow falling platform • Small pipe • Spine Coaster • Square cloud • Star • Star Coin • Stretch Block • Stretch Shroom • Super Mushroom • Swing • Swinging Hammer • Tilt Lift • Toad balloon • Trampoline • Turning Floor • Vine • Warp Cannon • Warp Pipe • Water Ball • Wind
Moves	Crouch • Dash • Double Jump • Drill Spin • Fly • Ground Pound • Jump • Midair Spin • Shell Toss • Simultaneous Ground Pound • Slide • Spin Jump • Stomp • Swallow • Swim • Triple Jump • Wall Jump
Enemies	Amp • Banzai Bill • Banzai Bill Cannon • Big Boo • Big Dry Bones • Big Fire Piranha • Big Fuzzy • Big Thwomp • Big Wiggler • Big Urchin • Bill Blaster • Bill Blaster Turret • Blooper • Blooper Baby • Blooper Nanny • Bob-omb • Boo • Boomerang Bro • Bramball • Broozer • Bulber • Bull's-Eye Banzai • Bullet Bill • Buzzy Beetle • Cannon • Cannonball • Chain Chomp • Cheep Cheep • Cheep-Chomp • Circling Boo Buddies • Clampy • Climbing Koopa • Cooligan • Crowber • Deep-Cheep • Dry Bones • Eep Cheep • Fire Bro • Fire Snake • Fish Bone • Flame Chomp • Foo • Fuzzy • Giant cannon • Giant cannonball • Giant Goomba • Goomba • Hammer Bro • Heavy Para-Beetle • Hefty Goomba • Huckit Crab • Ice Bro • Jellybeam • King Bill • Koopa Paratroopa • Koopa Troopa • Lakitu • Lava Bubble • Mechakoopa • Mega Cheep-Cheep • Mega Deep-Cheep • Mini Goomba • Missile Bill • Monty Mole • Muncher • Para-Beetle • Parabomb • Paragoomba • Piranha Flower • Piranha Plant • Pokey • Porcupuffer • Prickly Goomba • Quartet-cannon • River Piranha Plant • Rocky Wrench • Scaredy Rat • Sledge Bro • Spike • Spike Top • Spiny • Spiny Cheep Cheep • Spiny Egg • Stalking Piranha Plant • Stone Spike • Super Piranha Plant • Swoop • Thwomp • Urchin • Venus Fire Trap • Wiggler
Obstacles	Ash • Ball 'N' Chain • Burner • Circus ball • Fire Bar • Ghost Block • Ghost Vase • Giant Spiked Ball • Huge Icicle • Icicle • Jumbo Ray • Lava Geyser • Ring • Skewer • Spiked ball • Volcanic debris
Minigames	1-up Blast • Power-up Panels • Enemy Course
Further info	Paah • Coin Battle • Gallery • Glitches • Hint movies • Media • New Super Mario Bros. Wii: Simplified Piano Solos • Pre-release and unused content • Staff • Time Limit • Trading cards

[Edit] New Super Mario Bros. U / New Super Luigi U / New Super Mario Bros. U Deluxe
Playable characters	Mario^a • Luigi • Yellow Toad • Blue Toad • Mii • Nabbit^b • Toadette^c
Supporting characters	Princess Peach • Toad • Green Yoshi • Baby Yoshi (Balloon Baby Yoshi · Bubble Baby Yoshi · Glowing Baby Yoshi)
Bosses	Bowser • Bowser Jr. • Koopalings (Lemmy Koopa · Morton Koopa Jr. · Larry Koopa · Wendy O. Koopa · Iggy Koopa · Roy Koopa · Ludwig von Koopa) • Boom Boom • Boss Sumo Bro • Magikoopa
Worlds and areas	Acorn Plains • Layer-Cake Desert • Sparkling Waters • Frosted Glacier • Soda Jungle • Rock-Candy Mines • Meringue Clouds • Peach's Castle • Superstar Road • Secret Island • Coin Courses^a
Items and objects	! Switch • ? Block • ? Switch • 1-Up Mushroom • 3-Up Moon • 3-Up Moon Block • Arrow lift • Bean Platform • Big Block • Blue Coin • Blue Ring^b • Boost Block • Boost Star • Brick Block • Bridge • Checkpoint Flag^a • Chest • Cloud Lift^a • Coin • Coin Block • Cross Lift^a • Dark • Donut Block • Fire Flower • Floor • Flower • Flying ? Block • Frozen Coin • Fruit • Goal Pole (secret) • Goal ring^a • Green Coin • Green Ring • Hammer Pendulum • Hidden Block • Hidden Coin • Ice Block • Ice Chunk^a • Ice Flower • Iron Block • Leaf Platform • Light Block • Limited Lift • Luigi Block^b • Mega ? Block • Mini Mushroom • Mushroom Platform • Note Block • Nut • P Switch • P-Acorn • Paddle Platform^a • Pendulum Platform • Penguin Suit • Pole • POW Block • Propeller Mushroom • Red Coin • Red Ring • Remote-Control Platform^a • Rolling log^a • Scale Lift • Screwtop • Screwtop Lift • Screwtop Platform • Screwtop Shroom^a • Seesaw Log Bridge • Seesaw Shroom^a • Seesaw Shroom (blue)^b • Slide Lift^a • Small pipe • Snake Block • Spine Coaster • Star Lift • Stretch Block • Stretch Shroom^a • Stone block • Super Acorn • Super Crown^c • Super Guide Block^a • Super Mushroom • Super Star • Switch-Lift^b • Trampoline • Tree • Turning Floor • Warp Pipe • Water Ball^a • Wobble Rock^a • Yoshi egg
Moves	Crouch • Dash • Double Jump • Drill Spin • Fly • Ground Pound • Jump • Midair Spin • Simultaneous Ground Pound • Slide • Spin Jump • Stomp • Swallow • Swim • Triple Jump • Wall Jump
Enemies and obstacles	Amp^a • Banzai Bill • Banzai Bill Cannon • Big Amp^a • Big Boo • Big Buzzy Beetle^a • Big Cheep Cheep • Big Dry Bones • Big Deep Cheep^b • Big Eep Cheep^b • Big Fuzzy • Big Goomba • Big Koopa Troopa • Big Piranha Plant • Big Thwomp • Big Urchin • Big Venus Fire Trap^b • Big Wiggler • Bill Blaster • Bill Blaster Turret • Blooper • Blooper Baby^a • Blooper Nanny^a • Bob-omb • Bomb • Bony Beetle • Boo • Boomerang Bro • Bowser Stunner • Bramball • Broozer • Bulber^a • Bullet Bill • Burner • Buzzy Beetle • Cannon • Cannonball^a • Chain Chomp • Cheep Cheep • Cheep Chomp • Circling Boo Buddies • Cooligan • Deep Cheep^b • Dragoneel • Dry Bones • Eep Cheep • Energy ring • Fire Bro • Fire Snake • Fire Bar • Fire Piranha Plant • Fish Bone • Flame Chomp • Fliprus • Foo • Frost Piranha • Fuzzy • Ghost Block • Giant cannon • Giant cannonball • Giant Clam^a • Goomba • Goombrat • Grrrol • Hammer Bro • Heavy Para-Beetle • Hefty Goomba • Huckit Crab • Huge Fire Bar • Huge Icicle • Ice Bro • Icicle • Jellybeam^a • King Bill • Koopa Troopa • Lakitu • Lava Bubble • Lava Geyser^a • Magmaargh • Magmaw • Mecha Cheep^a • Mecha Hand • Mechakoopa • Mega Grrrol • Meteor • Mini Goomba • Missile Bill • Monty Mole • Muncher • Nabbit • Para-Beetle • Parabomb • Paragoomba^a • Paratroopa • Piranha Plant • Piranha Pod • Pokey • Porcupuffer • Prickly Goomba • River Piranha Plant • Rocky Wrench^a • Rubber ball • Scaredy Rat^a • Skewer • Sledge Bro • Spike • Spike Top • Spiked ball • Spinner • Spiny • Spiny Cheep Cheep • Spiny Egg • Stalking Piranha Plant • Stone Spike • Sumo Bro • Swoop^a • Targeting Ted • Thwimp^a • Thwomp • Torpedo tube^a • Torpedo Ted • Torpedo Base (Targeting Ted) • Urchin • Waddlewing • Wiggler
Others	Ash • Current • Enemy Course • Lava • Poison • Quicksand • Sand Geyser • Stone-Eye • Time Limit • Water Geyser
Game modes	Boost Mode • Challenge Mode^a • Boost Rush^a • Coin Battle^a
Further info	Paah • Gallery (New Super Mario Bros. U · New Super Luigi U · New Super Mario Bros. U Deluxe) • Glitches • Media • New Super Mario Bros. U + New Super Luigi U • Pre-release and unused content • Staff (New Super Mario Bros. U · New Super Luigi U · New Super Mario Bros. U Deluxe)
^a Exclusive to New Super Mario Bros. U ^b Exclusive to New Super Luigi U ^c Exclusive to New Super Mario Bros. U Deluxe

Jellybeam

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