<P> In the first season, Wade's weekly quest had him in search of piranha, goonch catfish (during his investigation of the Kali River goonch attacks), alligator gar, wels catfish, arapaima, piraíba, and a freshwater species of shark, the bull shark . All of them are supposedly deadly creatures shrouded with mystery . The show also focuses on explaining the creatures' feeding habits, behaviour and conservation status . Rebroadcasts of the episodes with captions showing behind the scenes commentary from the host about the particular episode can also be seen on both Animal Planet and Discovery Channel . These episodes are going by the title River Monsters: Unhooked . </P> <P> The second season of River Monsters began airing on 24 April 2010, although the first episode, titled "Demon Fish" first appeared on Discovery Channel on 28 March 2010 . This season consists 7 episodes and takes viewers to the River Congo and other far - and - wide locations . In the episode, "Death Ray", Wade catches a pregnant giant freshwater stingray, the largest fish he has ever caught . She later gives birth to two pups while she is being examined by Wade and a team of biologists . This season features the white sturgeon, Wade's another gigantic catch (although he said it's his biggest catch ever, the stingray he caught in an earlier episode was even bigger, so "Alaskan Horror" was probably filmed earlier). </P> <P> The ninth season of River Monsters was announced as the final season . </P> <Table> <Tr> <Th> Episode </Th> <Th> Title </Th> <Th> Original air date </Th> <Th> Unhooked air date </Th> </Tr> <Tr> <Th> </Th> <Td> "Piranha" </Td> <Td> 5 April 2009 </Td> <Td> 5 May 2010 (2010 - 05 - 05) </Td> </Tr> <Tr> <Td_colspan="4"> Red - bellied piranha Jeremy Wade journeys to the heart of Brazil, following reports in which a bus crashes into the Amazon River, and all the passengers are eaten by a pack of red - bellied piranhas . He investigates this and other stories to determine if the piranha really deserve its reputation and what exactly triggers a feeding frenzy . During his trip to remote regions of the Amazon river basin, he finds out that the bloodthirsty piranha is just as predator as prey . Finally he hears a chilling story about a child fallen into the river and after a few seconds, only the skeleton was found . He finally uncovers the truth that piranhas really can be dangerous to humans, but usually in the dry season when other food is scarce . <P> Featured animals </P> <Ul> <Li> Red - bellied piranha (Pygocentrus nattereri) </Li> <Li> Amazon river dolphin (Inia geoffrensis) </Li> <Li> Black - tailed payara (Hydrolycus armatus) </Li> <Li> Ripsaw catfish (Oxydoras niger) </Li> <Li> Redeye piranha (Serrasalmus rhombeus) </Li> </Ul> </Td> </Tr> <Tr> <Th> </Th> <Td> "Killer Catfish" </Td> <Td> 12 April 2009 </Td> <Td> 23 May 2010 (2010 - 05 - 23) </Td> </Tr> <Tr> <Td_colspan="4"> Mugger crocodile Jeremy arrives at the Kali River in India, where a number of mysterious drownings have occurred . He investigates the possibilities of the culprit being whirlpools or crocodiles, but determines neither fit . Wade eventually finds out of a little - known catfish species that can grow to human size or bigger, the goonch, also known as the giant devil catfish . He reasons that, since funeral pyres are done at the shore of the river, the fish feed off the burnt human remains . This would allow them to reach man - eating size, as well as giving them a taste of people . Jeremy then must face off against a large goonch, which may prove there are monsters of these species ready to eat people . When going after this fish Jeremy spends weeks trying to catch it, but the time eventually came when he had to take a risk and catch this elusive fish . This was the first ever episode of River Monsters to be made, but it only became a "Bonus episode" on the Region 1 DVDs and never released in the UK . Probably this is because the idea of making a whole series on monstrous fish came after shooting this episode (as explained in the 2014 special "Killer Mysteries"). <P> Featured animals </P> <Ul> <Li> Goonch catfish (Bagarius yarrelli) </Li> <Li> Indian narrow - headed softshell turtle (Chitra indica) </Li> <Li> Golden mahseer (Tor putitora) </Li> <Li> Mugger crocodile (Crocodylus palustris) </Li> <Li> Gharial (Gavialis gangeticus) </Li> <Li> South Asian river dolphin (Platanista gangetica) </Li> <Li> Indian flapshell turtle (Lissemys punctata) </Li> </Ul> </Td> </Tr> <Tr> <Th> </Th> <Td> "Alligator Gar" </Td> <Td> 19 April 2009 </Td> <Td> 9 May 2010 (2010 - 05 - 09) </Td> </Tr> <Tr> <Td_colspan="4"> Alligator gar Jeremy travels to the Trinity River in Texas, USA to discover the truth behind the alligator gar, a massive predator blamed for horrifying attacks on people . Reports claim this fish is more dangerous than a man - eating shark . With huge jaws and two rows of needle - sharp teeth, the gar proves an elusive opponent . Throughout the years this fish was in the centre of humanity's misunderstanding . Large populations were killed by electric gar destroyers all around the country, bringing this huge animal to near extinction . Bowfishermen also kill this fish with spears (leaving the fish to die in painful ways as seen in some internet videos), but Jeremy wants to catch one gar alive and release it back safely . Finally hooking a large gar, Jeremy finds out once and for all if the alligator gar deserves its reputation as a river monster . <P> Featured animals </P> <Ul> <Li> Alligator gar (Atractosteus spatula) </Li> <Li> American alligator (Alligator mississippiensis) </Li> <Li> Smallmouth buffalo (Ictiobus bubalus) </Li> <Li> Spiny softshell turtle (Apalone spinifera) </Li> </Ul> </Td> </Tr> <Tr> <Th> </Th> <Td> "European Maneater" </Td> <Td> 26 April 2009 </Td> <Td> 26 May 2010 (2010 - 05 - 26) </Td> </Tr> <Tr> <Td_colspan="4"> Wels catfish The Wels catfish is one of the largest catfish in the world . Medieval reports claim it is an aggressive man eater that will swallow people whole, even small children were found in one's stomach according to a legend . After new reports surface of attacks in Berlin, Germany, Jeremy Wade dives deep into the mystery of these fish . He finds out that these giants attack when they are protecting their nests during the breeding season . His investigation later leads him to Spain, where a group of catfish were introduced into the warm watered Rio Ebro . Numerous factors led to these creatures taking over the ecosystem and possibly growing to man - eating size, for example because of the fishermen's' catch and release' policy . There, Jeremy finds that these river monsters have no fear of man, and faces a potential maneater . <P> Featured animals </P> <Ul> <Li> Wels catfish (Silurus glanis) </Li> <Li> European zander (Sander lucioperca) </Li> <Li> Egyptian vulture (Neophron percnopterus) </Li> <Li> Griffon vulture (Gyps fulvus) </Li> </Ul> </Td> </Tr> <Tr> <Th> 5 </Th> <Td> "Amazon Assassins" </Td> <Td> 3 May 2009 </Td> <Td> 28 April 2010 (2010 - 04 - 28) </Td> </Tr> <Tr> <Td_colspan="4"> Arapaima The Amazon has a huge amount of river monsters . Anacondas, caimans, piranhas and jaguars all call this place home . Years ago, Jeremy Wade travelled here looking for the arapaima, a 10 - foot long fish that has been known to ram predators with the force of a car crash . The trip resulted in Jeremy feeling the full force of one of these blows as one arapaima's tail hit his chest . Now Jeremy has returned to Brazil to once again face off against this fish and determine if the arapaima deserves to be on the Amazon's already large list of monsters . Journeying to the few spots where fishing for these fish is allowed, he encounters an arapaima farm where the fish do something surprising . Jeremy then hears stories of the Amazon's other killers, the caiman . He searches for these, as well as a mysterious legend with its roots buried deep in folklore . Then, after finding the perfect spot, he finally comes face to face with the legendary giant, whose body could become a living missile . <P> Featured animals </P> <Ul> <Li> Arapaima (Arapaima gigas) </Li> <Li> Tiger sorubim (Pseudoplatystoma tigrinum) </Li> <Li> Black caiman (Melanosuchus niger) </Li> <Li> Black pacu (Colossoma macropomum) </Li> <Li> Green anaconda (Eunectes murinus) </Li> <Li> Yellow - spotted river turtle (Podocnemis unifilis) </Li> <Li> Spectacled caiman (Caiman crocodilus) </Li> <Li> Additional creature: the cobra grande </Li> </Ul> </Td> </Tr> <Tr> <Th> 6 </Th> <Td> "Amazon Flesh Eaters" </Td> <Td> 10 May 2009 </Td> <Td> 2 May 2010 (2010 - 05 - 02) </Td> </Tr> <Tr> <Td_colspan="4"> Redtail catfish Following a report of a fisherman swallowed whole, Jeremy travels to South America in search of the Amazon's largest catfish, the piraíba . Arriving there, Wade not only tries to catch this monster, but discovers that it belongs to a whole family of Amazonian killers . He catches as many catfish species as he can to prove that these whiskered predators really are the ultimate monsters of this place . His mission is to try and catch the three largest catfishes until he encounters with the smallest ones . He finds the candiru, a tiny blood - sucking catfish that has entered a man's body in the most horrifying of places, and the candiru - acú, a catfish that swarms around and drills holes in dead or dying animals, including humans, eating them from the inside out and leaving only the skin and bones . Discovering the horrifying deeds of these fish only pushes him even further, until he faces off with the giant head of the murderous catfish family,' the mother of all catfishes', the piraíba . <P> Featured animals </P> <Ul> <Li> Piraíba (Brachyplatystoma filamentosum) </Li> <Li> Redtail catfish (Phractocephalus hemioliopterus) </Li> <Li> Gilded catfish (Zungaro zungaro) </Li> <Li> Candirú (Vandellia cirrhosa) </Li> <Li> Candirú - Acú (Cetopsis candiru) </Li> <Li> Black - tailed payara (Hydrolycus armatus) </Li> <Li> Mexican burrowing caecilian (Dermophis mexicanus) </Li> <Li> Bloch's catfish (Pimelodus blochii) </Li> </Ul> </Td> </Tr> <Tr> <Th> 7 </Th> <Td> "Freshwater Shark" </Td> <Td> 17 May 2009 </Td> <Td> 12 May 2010 (2010 - 05 - 12) </Td> </Tr> <Tr> <Td_colspan="4"> Bull shark Sharks are perhaps the most dangerous and feared of all fish, but these predators are confined to the oceans . Or maybe not...The bull shark, the most dangerous and aggressive shark, has been known to swim miles up rivers . Jeremy follows reports of attacks in rivers near the most populated shores of Australia to find out why and how far these fish swim upstream . He traces the trail of blood left by these monsters from bays and lagoons to rivers, until he finally zeros in on the lair of these sea monsters . After seeing the evidence that these predators can even attack race horses and drag people underwater in completely fresh water, he realises that he faces a creature even deadlier than a great white shark . While fishing for one, Jeremy finds something even more shocking and terrifying than a fully grown shark . <P> Featured animals </P> <Ul> <Li> Bull shark (Carcharhinus leucas) </Li> <Li> Saltwater crocodile (Crocodylus porosus) </Li> <Li> Giant grouper (Epinephelus lanceolatus) </Li> <Li> Freshwater crocodile (Crocodylus johnsoni) </Li> <Li> Short - finned eel (Anguilla australis) </Li> </Ul> </Td> </Tr> </Table>

When does the new river monsters season start
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