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River Monsters poster

River Monsters (2009)

Adventure · Documentary · Mystery

Extreme angler Jeremy Wade is on the hunt for fish with a taste for human flesh. This rip-roaring ride mixes action and adventure with mysteries, edge-of-the-seat chase and a battle of wills between man and nature.

IMDb rating
8.2 (6,595 votes)
Episode average
8.4 ↑ +0.2 vs IMDb
Seasons
9
Streaming (US)
HBO Max
Language
EN
Type
TV series

Rating trend: this show's seasons do not settle into one shape. Rising Shows ranks whole shows by the shape of their rating trend rather than one average score, which is how you find a show that got better rather than a show that started well.

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Ratings refreshed Oct 3, 2026 · 9 seasons indexed

Cast

Seasons

Season 1 (2009)

8.13 avg 7 episodes 8.1 → 7.9 43 min avg

Ep 1: 8.1 · 154 votesEp 2: 8.3 · 116 votesEp 3: 7.7 · 133 votesEp 4: 8.1 · 121 votesEp 5: 8.4 · 113 votesEp 6: 8.4 · 106 votesEp 7: 7.9 · 104 votes
Season 1 episodes - IMDb ratings
#TitleRatingVotes
1Piranha8.1154
2Killer Catfish8.3116
3Alligator Gar7.7133
4European Maneater8.1121
5Amazon Assassins8.4113
6Amazon Flesh Eaters8.4106
7Freshwater Shark7.9104

Season 2 (2010)

8.41 avg 8 episodes 8.5 → 8.9 43 min avg

Ep 1: 8.5 · 129 votesEp 2: 8.7 · 108 votesEp 3: 8.0 · 101 votesEp 4: 8.0 · 98 votesEp 5: 8.5 · 94 votesEp 6: 8.2 · 97 votesEp 7: 8.5 · 91 votesEp 8: 8.9 · 37 votes
Season 2 episodes - IMDb ratings
#TitleRatingVotes
1Demon Fish8.5129
2Death Ray8.7108
3Killer Snakehead8.0101
4Congo Killer8.098
5Alaskan Horror8.594
6Rift Valley Killers8.297
7Hidden Predator8.591
8Special: Killer Catfish (Extended Cut)8.937

Season 3 (2011)

8.33 avg 12 episodes 7.9 → 8.8 43 min avg

Ep 1: 7.9 · 94 votesEp 2: 8.3 · 81 votesEp 3: 8.2 · 75 votesEp 4: 8.4 · 81 votesEp 5: 8.3 · 79 votesEp 6: 8.4 · 82 votesEp 7: 8.3 · 79 votesEp 8: 7.8 · 32 votesEp 9: 8.5 · 31 votesEp 10: 8.7 · 34 votesEp 11: 8.3 · 30 votesEp 12: 8.8 · 41 votes
Season 3 episodes - IMDb ratings
#TitleRatingVotes
1The Mutilator7.994
2Flesh Ripper8.381
3Silent Assassin8.275
4Chainsaw Predator8.481
5Electric Executioner8.379
6Cold-Blooded Horror8.482
7Jungle Killer8.379
8Special: The Deadliest7.832
9Special: The Most Bizarre8.531
10Special: The Lost Reels - Amazonian Giant8.734
11Special: The Lost Reels - Himalayan Giant8.330
12Special: River Monsters Goes Tribal8.841

Season 4 (2012)

8.47 avg 14 episodes 8.2 → 8.2 47 min avg

Ep 1: 8.2 · 73 votesEp 2: 8.6 · 77 votesEp 3: 8.1 · 68 votesEp 4: 8.1 · 66 votesEp 5: 8.8 · 38 votesEp 6: 8.3 · 68 votesEp 7: 8.6 · 65 votesEp 8: 8.6 · 59 votesEp 9: 9.3 · 81 votesEp 10: 8.6 · 30 votesEp 11: 8.0 · 33 votesEp 12: 8.7 · 35 votesEp 13: 8.5 · 25 votesEp 14: 8.2 · 34 votes
Season 4 episodes - IMDb ratings
#TitleRatingVotes
1American Killers8.273
2Pack of Teeth8.677
3Invisible Executioner8.168
4Asian Slayer8.166
5Killer Sharks and Rays8.838
6Russian Killer8.368
7Mongolian Mauler8.665
8Phantom Assassin8.659
9Lair of Giants9.381
10Special: Killer Weapons8.630
11Special: Lethal Legends8.033
12Special: Deadliest Encounters8.735
13Special: Deadliest Catfish8.525
14Special: Untold Stories8.234

Season 5 (2010)

8.34 avg 7 episodes 8.5 → 7.4 59 min avg

Ep 1: 8.5 · 58 votesEp 2: 8.4 · 68 votesEp 3: 8.8 · 63 votesEp 4: 8.8 · 56 votesEp 5: 8.0 · 72 votesEp 6: 8.5 · 88 votesEp 7: 7.4 · 11 votes
Season 5 episodes - IMDb ratings
#TitleRatingVotes
1Face Ripper8.558
2Atomic Assassin8.468
3Killer Torpedo8.863
4Colombian Slasher8.856
5Vampires of the Deep8.072
6Legend of Loch Ness8.588
7Special: "Year of Beasts"7.411

Season 6 (2014)

8.62 avg 11 episodes 8.6 → 9.0 44 min avg

Ep 1: 8.6 · 61 votesEp 2: 8.5 · 53 votesEp 3: 8.5 · 62 votesEp 4: 8.8 · 60 votesEp 5: 8.7 · 56 votesEp 6: 8.5 · 57 votesEp 7: 8.5 · 26 votesEp 8: 8.4 · 25 votesEp 9: 8.6 · 28 votesEp 10: 8.7 · 27 votesEp 11: 9.0 · 24 votes
Season 6 episodes - IMDb ratings
#TitleRatingVotes
1Amazon Titanic8.661
2Jungle Terminator8.553
3River of Blood8.562
4Man-Eating Monster8.860
5Bone Crusher8.756
6Body Snatcher8.557
7Special: Monster Hunting Secrets8.526
8Special: American Horrors8.425
9Special: Killer Mysteries8.628
10Special: Lethal Encounters8.727
11Special: Worst Nightmares9.024

Season 7 (2015)

8.65 avg 11 episodes 8.9 → 8.5 44 min avg

Ep 1: 8.9 · 55 votesEp 2: 8.7 · 48 votesEp 3: 8.5 · 44 votesEp 4: 8.5 · 57 votesEp 5: 8.3 · 53 votesEp 6: 8.5 · 54 votesEp 7: 8.8 · 36 votesEp 8: 8.6 · 24 votesEp 9: 8.9 · 23 votesEp 10: 8.9 · 22 votesEp 11: 8.5 · 22 votes
Season 7 episodes - IMDb ratings
#TitleRatingVotes
1Canadian Horror8.955
2Mekong Mutilator8.748
3Jurassic-Sized Prehistoric Terror8.544
4Alaska's Cold Water Killer8.557
5South Pacific Terrors8.353
6Africa's Deadliest8.554
7Prehistoric Terror8.836
8Special: Flashback to the First8.624
9Special: Jeremy's Favorite Moments 18.923
10Special: Jeremy's Favorite Moments 28.922
11Special: Size Matters8.522

Season 8 (2016)

8.46 avg 13 episodes 8.5 → 7.8 41 min avg

Ep 0: 8.5 · 26 votesEp 1: 8.9 · 61 votesEp 2: 8.8 · 62 votesEp 3: 8.8 · 52 votesEp 4: 8.5 · 53 votesEp 5: 8.8 · 47 votesEp 6: 8.8 · 29 votesEp 7: 8.8 · 39 votesEp 8: 7.4 · 37 votesEp 9: 8.0 · 25 votesEp 10: 8.8 · 28 votesEp 11: 8.1 · 26 votesEp 12: 7.8 · 24 votes
Season 8 episodes - IMDb ratings
#TitleRatingVotes
0Season 8 Sneak Peek8.526
1Deep Sea Demon8.961
2Death Down Under8.862
3Razorhead8.852
4Devil of the Deep8.553
5Terror in Paradise8.847
6Special: Into the Ocean8.829
7Special: Secrets at Sea8.839
8Special: Invisible Killers7.437
9Special: Deadly Superstitions8.025
10Special: Blood River8.828
11Special: Killer Discoveries8.126
12Special: Aftershow7.824

Season 9 (2017)

8.23 avg 6 episodes 8.1 → 9.0 51 min avg

Ep 1: 8.1 · 44 votesEp 2: 8.1 · 38 votesEp 3: 8.3 · 48 votesEp 4: 7.5 · 44 votesEp 5: 8.4 · 46 votesEp 6: 9.0 · 43 votes
Season 9 episodes - IMDb ratings
#TitleRatingVotes
1Coral Reef Killer8.144
2Volcanic Island Terror8.138
3Ice Cold Killer8.348
4Return of the Killer Catfish7.544
5Malaysian Lake Monster8.446
6Special: Killer from the Abyss9.043

Episode ratings and vote counts from IMDb. Poster, overview, and streaming data from TMDB. Data refreshed 2026-10-03.

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