Water

Attack

Water type is super effective against Ground,Fire and Rock type

Water type is not very effective against Electric types

Defense
Ground, Fire and Rock type are not very effective against Water type

Electric types are super effective against Water type

All Water Type Pokemon(In Pokedex Order)
007 Squirtle

008 Wartortle

009 Blastoise

054 Psyduck

055 Golduck

060 Poliwag

061 Poliwhirl

086 Seel

090 Shellder

098 Krabby

099 Kingler

116 Horsea

117 Seadra

118 Goldeen

119 Seaking

120 Staryu

129 Magikarp

134 Vaporeon

158 Totodile

159 Croconaw

160 Feraligatr

186 Politoed

223 Remoraid

224 Octillery

245 Suicune

258 Mudkip

259 Marshtomp

260 Swampert

320 Wailmer

321 Wailord

341 Corphish

349 Feebas

350 Milotic

351 Rainy Castform

367 Huntail

368 Gorebyss

370 Luvdisc

382 Kyogre

393 Piplup

394 Prinplup

418 Buizel

419 Floatzel

422 Shellos

456 Finneon

457 Lumineon

489 Phione

490 Manaphy

501 Oshawott

502 Dewott

503 Samurott

515 Panpour

516 Simipour

550 Basculin

594 Alomomola

656 Froakie

657 Frogadier

658 Greninja

692 Clauncher

693 Clawitizer