Survivor Wiki
Survivor Wiki

Cell Block Sea (also known as Phish Farm and Serpent Turf) is a recurring challenge on Survivor.


Castaways must race out into the water and swim over to their respective tribe's bamboo cage. Once the entire tribe has arrived, each person must climb up and over the cage wall and jump into the water. They must then retrieve a large item and bring it back to shore, where they will complete a final task. The first tribe(s) to finish this final task would win.


United States[]

The challenge debuted in as a Reward/Immunity Challenge in Caramoan, where each tribe had to retrieve a heavy chest from the cage, then move the chest along a track and onto a platform using grappling hooks, with the first tribe to get their chest on their finish platform winning. The tribes traded the lead throughout the challenge, with Bikal narrowly hooking their final piece of track ahead of Gota to win, sending Gota to their second straight Tribal Council.

In Cagayan, the challenge was once again used for reward and immunity, with the tribes collecting four fish traps from the cage, before using the puzzle pieces in the fish traps to solve a puzzle back on the beach. Luzon took a large lead over Aparri and Solana heading into the puzzle stage, but J'Tia Taylor cost them the challenge when she failed to complete the puzzle. Sarah Lacina managed to finish first for Aparri, and LJ McKanas finished second for Solana, sending Luzon back to Tribal Council.

The challenge reappeared in Game Changers, again for reward and immunity, where six members of each tribe had to drag a 400-pound snake out of the cell and onto shore. The three remaining castaways had to retrieve numbered tiles from the snake, after which a code could be solved, unlocking rings which they must toss onto eight targets to spell "IMMUNITY". Nuku had an early lead with their strategy of involving every single castaway, while Mana fell behind when they had difficulty transporting their snake. However, Mana was able to catch up on the ring toss thanks to Malcolm Freberg, but Nuku managed to pull out and win again, sending Mana back to Tribal Council.

The challenge was used as the fourth Immunity Challenge in Ghost Island, in a similar design to Caramoan, but with only one piece of track to hook, and an additional stage of getting all five balls in the chest on top of a narrow perch. Malolo had a huge lead heading into the final task after Naviti struggled throughout the challenge. However, Naviti managed to catch up when Malolo could not get their final ball on their perch, allowing Naviti to come from behind and win, sending Malolo to Tribal Council.

In Edge of Extinction, the challenge was again used for reward and immunity, and worked similarly to Game Changers, except that all eight members of each tribe would now start on a floating platform instead of racing out from the beach. Kama took an early lead after Keith Sowell struggled in the water for Manu. Although Keith attempted to make up for the deficit during the ring toss portion, he only set Manu further back, allowing Kama to pull out their second consecutive victory, sending Manu back to Tribal Council.

The Edge of Extinction format was reused in Survivor 43, with a puzzle piece being unlocked instead of rings. Each tribe would then solve a jigsaw puzzle of the season's logo. Vesi lagged behind for most of the challenge; Nneka Ejere's poor showing at the puzzle proved to be the nail in their coffin, as Baka and Coco defeated them handily, sending them to Tribal Council.



South Africa[]

The Survivor: Cagayan version of the challenge was played for tribal reward in Immunity Island. With Santoni Engelbrecht lagging behind on the first part of the challenge, Vuna fell behind and gave Zamba the lead heading into the rotating puzzle. However, both tribes were quickly equalized as neither tribe could figure out the puzzle. In the end, Dino Paulo figured out the puzzle first, winning Zamba a fishing kit.

United Kingdom[]

The challenge appeared as the seventh tribal Immunity Challenge of Survivor U.K. (2023), where the tribes had to build an arch puzzle to spell out "IMMUNITY" to win. Christopher Haul attempted to throw the challenge for La Nena, but his tribemates managed to pick up the slack and catch up to Caletón. In a photo finish, Caletón made it back to their mat before La Nena, but failed to notice an error with their puzzle, thus yielding the win to La Nena.


Episode Challenge Type Winners
"There's Gonna Be Hell to Pay"
Tribal Reward/Immunity S26 andrea tS26 brandon tS26 brenda t
S26 cochran tS26 corinne tS26 dawn t
S26 erik tS26 malcolm tS26 phillip t
"Hot Girl with a Grudge"
Tribal Reward/Immunity S28 cliff tS28 lindsey tS28 sarah t
S28 tony tS28 trish tS28 woo t
S28 alexis tS28 brice tS28 jefra t
S28 jeremiah tS28 lj tS28 morgan t
Game Changers
"The Stakes Have Been Raised"
Tribal Reward/Immunity S34 andrea tS34 brad tS34 cirie t
S34 debbie tS34 jt tS34 ozzy tS34 sarah t
S34 sierra tS34 tai tS34 zeke t
Ghost Island
"Trust Your Gut"
Tribal Immunity S36 angela tS36 chris tS36 domenick tS36 donathan t
S36 james tS36 laurel tS36 libby tS36 wendell t
Edge of Extinction
"One of Us Is Going to Win the War"
Tribal Reward/Immunity S38 aubry tS38 aurora tS38 eric t
S38 gavin tS38 joe tS38 julia t
S38 julie tS38 ron tS38 victoria t
Survivor 43
"Lovable Curmudgeon"
Tribal Reward/Immunity S43 elie tS43 gabler t
S43 jeanine tS43 owen tS43 sami t
S43 cassidy tS43 geo tS43 james t
S43 karla tS43 lindsay tS43 ryan t

Episode Challenge Type Winner
Episode 2
Tribal Reward FRS7 adrien tFRS7 chloe tFRS7 erick t
FRS7 filomene tFRS7 gregoire tFRS7 laurent tFRS7 veronique t
Episode 4
Tribal Reward FRS8 bertrand tFRS8 carole tFRS8 christelle t
FRS8 christophe tFRS8 christopher tFRS8 frederic tFRS8 nathalie t
Raja Ampat
Episode 1
Tribal Reward FRS13 alexandra tFRS13 anthony tFRS13 benoit t
FRS13 caroline tFRS13 delisia tFRS13 gege tFRS13 naouel t
FRS13 patricia tFRS13 steve tFRS13 teheiura t
La Nouvelle Édition
Episode 2
Tribal Immunity FRS16 florence tFRS16 laurence tFRS16 laurent t
FRS16 moundir tFRS16 sandra tFRS16 teheiura t
Episode 5
Tribal Immunity FRS21 andre tFRS21 marguerite tFRS21 melanie t
FRS21 romain tFRS21 sandrine tFRS21 sebastien tFRS21 tugdual t
L'Île des Héros
Episode 1
Tribal Immunity FRS24 alexandra tFRS24 benoit tFRS24 ines t
FRS24 naoil tFRS24 regis tFRS24 sam tFRS24 valerie t
La Légende
Episode 7
Tribal Reward FRS27 alexandra tFRS27 alix tFRS27 jade t
FRS27 laurent tFRS27 loic tFRS27 namadia tFRS27 teheiura t
Korok (La Légende)
Les Chasseurs d'Immunité
Episode 2
Tribal Reward FRS30 Alexis tFRS30 Amri tFRS30 Aurélien t
FRS30 Léa tFRS30 Nathalie tFRS30 Océane t
FRS30 Pauline tFRS30 Sarah tFRS30 Sébastien t

Episode Challenge Type Winners
Survivor Québec (2023)
Episode 19
Tribal Immunity QCS1 christophe tQCS1 jeanjunior tQCS1 joel tQCS1 kimberly t
QCS1 marika tQCS1 sandrine tQCS1 sango tQCS1 sylvain t
Survivor Québec (2024)
Episode 19
Tribal Immunity QCS2 desneiges tQCS2 dominic tQCS2 erick tQCS2 ghyslain t
QCS2 gwladys tQCS2 jeanmichel tQCS2 kassandre tQCS2 nabil t

Episode Challenge Type Winners
Immunity Island
"I Can Go 'Bos'... No Pun!"
Tribal Reward ZAS8 amy tZAS8 anela tZAS8 dino t
ZAS8 marisha tZAS8 nicole tZAS8 qiean t
ZAS8 renier tZAS8 shaun tZAS8 thoriso t

Episode Challenge Type Winners
Survivor U.K. (2023)
Episode 7
Tribal Immunity UKS3 ashleigh tUKS3 christopher tUKS3 hannah t
UKS3 lee tUKS3 leilani tUKS3 matthew tUKS3 tinuke t
La Nena




Recurring Challenges
A Bit Dinghy · A Bit Tipsy · A Crate Idea · A Leg Up · A Numbers Game · Air Raid · Angry Chair · Around the Bend · Back in Slack · Balancing Point · Ballin' A Jack · Barrel Bridge · Barrel of Monkeys · Basket Brawl · Better Homes and Island Living · Beyond the Wheel · Blind Leading the Blind · Blue Lagoon Bustle · Blue Plate Special · Boats, Brains & Brawn · Bone to Pick · Boulder Smash · Bow Diddley · Box Your Mind · Braille Maze · Broken China · Buggin' Out · Build It Up, Break It Down · Butch Cassidy · By Any Means Necessary · By the Numbers · Cage Against the Machine · Can't Buoy Me Love · Cannonball Run · Caught in the Web · Cell Block Sea · Challenge Pitch · Chief's Choice · Chimney Sweep · Chinese Zodiac Symbols · Choose Your Weapon · Coconut Juice · Crate Escape · Crocodile Rock · Crosswalk · Cube Crisis · Dear Liza · Dive Masters · Dizzy Gillespie · Dizzy Miss Lizzy · Domino Effect · Draggin' the Dragon · Dragging the River · Drop A Log · Drum Roll · Dulcimer Stomp · End of the Line · EOC · Eve 6 · Fallen Comrades · Fast Fire · Faulty Towers · Fauxconut Bowling · Fire and Water · Fire Fighter · Fire Starter · Flips, Flops, & Flags · Float Your Boat · Floating Puzzle · Game of Bridge · Gatecrasher · Get a Grip · Get Barreled · Get Hooked · Get Your Goat · Gimme Three Steps · Great Escape Run · Hands on a Hard Idol · Hear About It Ladder · Hot Pursuit · House of Cards · House of the Holey · Idol Hands · Jail Break · Jump Shot · Jungle Relay · Kamikaze · Keel Hauling · Keep It Up · Keep on Your Toes · Kenny Log-Ins · Kicking and Screaming · Kitty Litter · Know Your Loved One · Ladder Tree Golf · Last Gasp · Letter Hunt · Lock, Load and Light · Lock Step · Log Jam · Losing Face · Mask Match · Matchmaker · Matt Finish · Mayan Pizza · Memory · Mud Pack · Mud Slide · Muddy Waters · New School · New Tribe Member · Nut Bucket · O-Black Water · Odd Shaped Bottoms · Operation Balance Build · Out on a Limb · Over-Extended · Paddle Battle · Paddle Out · Perch · Pilfering Pirates · Piranha Feast · Pole Dancing · Pot Head · Push Me, Pull You · Puzzle Dig · Q and A · Quest for Fire · Race to Shore · Ram-Ball On · Rescue Mission · Rice Race · Rise and Shrine · Rock Bottom · Rock n' Roll · Rock the Boat · Rod Screw-It · Roll With It · Roller Ball · Rung O Star · Running Down a Dream · Sacrificial Lamb · Schmergen Brawl · Sea Crates · Sea Legs · Sea Salvage · Shipwrecked · Shoot 'n' Shuffle · Shooting Gallery · Shoulder the Load · Simmotion · Slip, Slide & Score · Slither Me Timbers · Smash and Grab · Snag, Drag and Bag · Snake in the Grass · Snake Island Relay · SOS Signal · Spear-it Hunt · Spit It Out · Splash Back · Sprung a Leak · Squared Off · Squatty Probst · Stacked Up · Stairway to Heaven · Stairway to the Stars · Star Man · Station By Station · Step on Up · Stomp-ede · Strung Out · Sumo at Sea · Super Ramp · Survivor Auction · Survivor History · Survivor Pentathlon · Survivor Quiz Show · Swahili Scramble · Swing Break · Tangled Up · Temple Transfer · The Ball Drop · The Cruel Sea · The Game is Afoot · The Gauntlet · The Home Stretch · The Maze · The Obstacle Course · This Much · Thrash, Splash & Bash · TLP O-Course · Tomb Raider · Total Recall · Troubled Water · Uncomfortably Numb · United We Stand · Vampire Bats · Vertically Challenged · Vertigo · Wall to Wall · Well Stacked · What-er Drag · When It Rains, It Pours · Wicker Flicker · Will It Go Round · Witch Hunt · Wrist Assured · Yank Your Hank · You Shook Me