| Glossary Term starting with T |
| Search SeaLifeBase |
| T-net |
| T0 |
| Table |
| Tableknoll |
| Tablemount |
| Tackle |
| Tactile |
| Taeniform |
| Tag loss |
| Tagging |
| Tagging mortality |
| Tagging-recapture |
| Tail |
| Tail fin |
| Tail tuck |
| Tail walking |
| Tail-bud stage |
| Tail-free stage |
| Tailing |
| Tailrace |
| Tailwater |
| Taint |
| Taiwan Fisheries Research Institute, Chilung, Taiwan |
| Taiwan Fisheries Research Institute, Taitung, Taiwan |
| Tambak |
| Tandem selection |
| Tangle net |
| Tangs |
| Tank |
| Tapetum lucidum |
| Tapeworms |
| Taphonomy |
| Tapwater |
| Tarama |
| Target species |
| Tarn |
| Tarpons |
| Tasman Sea |
| Tasmanian Fisheries Development Authority |
| Tassel |
| Tatami-iwashi |
| Tautology |
| Tautonym |
| Tautonymy |
| Taxis |
| Taxocene |
| Taxon |
| Taxonomic |
| Taxonomic group |
| Taxonomic hierarchy |
| Taxonomic taxon |
| Taxonomy |
| Teardrop |
| Teat |
| Tectal |
| TED |
| Teeth |
| Tele- |
| Telencephalon |
| Teleosts |
| Teleplanic |
| Telescopefishes |
| Telescopic eye |
| Telmatophilous |
| Telmicolous |
| Telocentric |
| Telolecithal |
| Telolecithal eggs |
| Telson |
| Temperate |
| Temperate basses |
| Temperate ocean-basses |
| Temperate region |
| Temperature |
| Temporal |
| Temporal closure |
| Temporary specializations for pelagic life |
| Tenaculum |
| Tenderometer |
| Tendon |
| Tendril |
| Tenericutes |
| Tenpounders |
| Tentacle |
| Tentaculum |
| Tentering |
| Tenuis stage |
| Teratogen |
| Teratological |
| Teratological specimen |
| Terete |
| Term size |
| Terminal |
| Terminal 3 cartilage |
| Terminal fisheries |
| Terminal lake |
| Terminal lobe |
| Terminal male |
| Terminal margin |
| Terminal mouth |
| Terminal-phase male |
| Termination |
| Terminus |
| Ternary name |
| Terrace |
| Territorial |
| Territorial behaviour |
| Territorial waters |
| Territoriality |
| Territory |
| Tertiary |
| Tertiary production |
| Tessellated |
| Tesserae |
| Teste |
| Testes |
| Testis |
| Tetra- |
| Tetraodon poisoning |
| Tetraodontoxin |
| Tetraploid |
| Tetrodotoxic fishes |
| Tetrodotoxication |
| Tetrodotoxin |
| Texas A & M University Texas Cooperative Wildlife Collection, Texas |
| Texas Memorial Museum, University of Texas, Austin |
| Texas Tech. University, Lubbock, Texas |
| Thalassic |
| Thalassophilous |
| Thalassoplankton |
| Thalweg |
| Thaw drip |
| The Charleston Museum, Charleston, South Carolina |
| The Coastal Waters of Southeast Alaska and British Columbia |
| The Natural History Museum |
| Thelytokous |
| Therm- |
| Thermal layer |
| Thermal refugium |
| Thermal spring |
| Thermo- |
| Thermocline |
| Thermohaline |
| Thermopegic |
| Thermophilic |
| Thermophobic |
| Thickler chain |
| Thigmotropic |
| Thimble |
| Thinning |
| Thirds |
| Tholichthys stage |
| Thoracic |
| Thorn |
| Thornbacks |
| Thornfishes |
| Thornlet |
| Thorny catfishes |
| Threadfin breams |
| Threadfins |
| Threat |
| Threatened |
| Threatened species |
| Three-toothed puffer |
| Threefin blennies |
| Thresher sharks |
| Threshold |
| Throat |
| Throat teeth |
| Throw net |
| Thunfischwürstchen |
| Thunniform swimming |
| Thymus |
| Thyroid gland |
| Tidal flat |
| Tidal marsh |
| Tidal stream transport |
| Tide |
| Tide pool |
| Tigerperches |
| Tight pack |
| Tilapia |
| Tilefishes |
| Timor Sea |
| Tinabal |
| Tinapa |
| Tip |
| Tip length |
| Tiphic |
| Tiphicolous |
| Tiphiphilous |
| Tippet |
| Tire reef |
| Tjakalang |
| Toadfishes |
| Tokan-hin |
| Tokyo University of Fisheries, Ichthyological Laboratory, Tokyo |
| Ton |
| Tongue |
| Tonguefishes |
| Tonne |
| Tonno |
| Tooth plate |
| Tooth rows |
| Toponym |
| Topotype |
| Topotypical population |
| Torching |
| Torpedoform |
| Torrent catfishes |
| Torso thrust (with clasper flexion) |
| Total allowable catch |
| Total fecundity |
| Total length |
| Total mortality |
| Total productivity |
| Towed net |
| Toxactinium |
| Toxic |
| Toxin |
| Trabecula |
| Trabecular |
| Tracing predator |
| Tracking predator |
| Tradable permit |
| Trade winds |
| Trade-off |
| Traditional Chinese medicine |
| Traditional classification |
| Tragedy of the commons |
| Trahiras |
| Trailing |
| Trailing edge |
| Trait |
| Tram oil |
| Trammel net |
| Tran oil |
| Trans- |
| Transboundary stock |
| Transducer |
| Transferred species |
| Transformation |
| Transformation in fish larvae |
| Transformation stage |
| Transhipping |
| Transition |
| Transition zone |
| Transliterate |
| Transliteration |
| Translocation |
| Translucent object |
| Translucent zone |
| Transnational fishery |
| Transparent object |
| Transplanted species |
| Transshipment |
| Transverse |
| Transverse curtain |
| Transverse groove |
| Transverse ridges |
| Transverse scale row |
| Trap and haul program |
| Trap fishing |
| Trap net |
| Trash collector |
| Trash fish |
| Traumatogenic |
| Trawl |
| Trawl winch |
| Trawler |
| Treatment of poisoning of venomous fishes |
| Tree |
| Trematoda |
| Trematode |
| Trench |
| Trenchant |
| Trepang |
| Tri- |
| Triaclyglycerol |
| Triassic |
| Tribasal pectoral fin |
| Tribe |
| Tricuspid |
| Tricuspid tooth |
| Trifid |
| Trifurcate |
| Triggerfishes |
| Trihedral |
| Trilobate lower lip |
| Trim net |
| Trimethylamine oxide |
| Trimming |
| Trimmings |
| Trinomen |
| Triplespines |
| Tripletails |
| Triploid |
| Tripus |
| Triradiate |
| Tritor |
| Tritors |
| Trituration |
| Trivial name |
| Troglobite |
| Troglobitic |
| Troglomorphic |
| Troglophile |
| Troll fishery |
| Trolling |
| Troop |
| Tropeic folds |
| Trophic |
| Trophic level |
| Trophic model |
| Tropholytic |
| Trophonemata |
| Trophotaenia |
| Trophotaeniae |
| Tropical |
| Tropical region |
| Tropism |
| Trot line |
| Trough |
| Trouser trawl |
| Trout-perches |
| Trucking |
| True hermaphroditism |
| Trumpeters |
| Trumpetfishes |
| Truncate |
| Trunk |
| Tsukadani |
| Tube-eye or thread-tail |
| Tubeblennies |
| Tubercle |
| Tuberculate |
| Tuberculate ridge |
| Tuberous organ |
| Tubeshoulders |
| Tubiform |
| Tubular |
| Tubular eye |
| Tubule |
| Tuck seine |
| Tulane University Museum of Natural History, Louisiana |
| Tumid |
| Tuna ham |
| Tuna links |
| Tuna longline |
| Tunas |
| Tunicates |
| Turbellaria |
| Turbid |
| Turbidity |
| Turbidity current |
| Turbidity of the skin |
| Turgid |
| Turnover |
| Turtle grass |
| Tusk |
| Tuyo |
| Twin body trawl |
| Twin rig |
| Two walled net |
| Tyee |
| Tympanic head spine |
| Tympanum |
| Tyoptype |
| Type |
| Type designation |
| Type genus |
| Type horizon |
| Type host |
| Type locality |
| Type material |
| Type selection |
| Type series |
| Type species |
| Type-series |
| Type-subspecies |
| Typical |
| Typonym |
| Tyrrhenian Sea |