| Glossary Term starting with W |
| Search SeaLifeBase |
| Wadi |
| Waif |
| Wallace's line |
| Warm monomictic |
| Warm spring |
| Warm water |
| Warmgerookte gezouten haring |
| Warmwater fishes |
| Warp |
| Warty anglers (handfishes) |
| Waryfishes |
| Wash zone |
| Washing |
| Waste |
| Wastewater |
| Water column |
| Water content |
| Water hardness |
| Water haul |
| Water mass |
| Water parting |
| Water table |
| Water-hardening |
| Watercourse |
| Waterfall |
| Watershed |
| Weak |
| Weaning |
| Weasel sharks |
| Weber's line |
| Weberian apparatus |
| Weberian ossicles |
| Weberian vertebrae |
| Weed fish |
| Weeverfishes |
| Weir |
| West india |
| West indian |
| West Pacific |
| Westark Community College, Arkansas |
| Westerlies |
| Western Australian Museum |
| Westoll lines |
| Wet cured |
| Wet deposition |
| Wet fish |
| Wet reduction |
| Wet salted |
| Wet salted fish |
| Wet stack |
| Wet weight |
| Wetlands |
| Whale shark |
| Whalelike catfishes |
| Whiptail breams |
| White fish |
| White Sea |
| White sharks |
| White wings |
| Whitebait |
| Whitebait stage |
| Whole fish |
| Wichita State University, Kansas |
| Wicker trap |
| Wide Area Information Server |
| Wide Area Network |
| Width |
| Width of perivitelline space |
| Wiener Linie |
| Wiener Zoll |
| Wild |
| Wild spawning |
| Wild species |
| Wild stock |
| Wilfrid Laurier University Zoological Museum Ichthyological Collection, Ontario |
| Wind dried fish |
| Windward |
| Winf |
| Wing |
| Winter pond |
| Wintering |
| Winterkill |
| Withdrawal period |
| Within family selection |
| Wolf herrings |
| Wolffian duct |
| Wolffishes |
| Work |
| Work of an animal |
| Workstation |
| World Wide Web |
| Worm or spaghetti eels |
| Wormfishes |
| Wounding gear |
| Wrap |
| Wrapping |
| Wrasses |
| Wreckfishes |
| Wrymouths |