提塔利克鱼（学名：Tiktaalik）是一种已灭绝的早期鱼类，生存于泥盆纪晚期，拥有许多类似两生类的特征，一些保存良好的化石于2004年在加拿大北部的埃尔斯米尔岛被发现。牠是鱼类演化成能更适应氧气含量较低的浅海的一种物种 ，牠们后来逐渐进化成两生类。

提塔利克鱼大约生存于3亿7,500万年前，古生物学家认为牠是鱼类（如生存在3亿8,000万年前的潘氏鱼）及早期四足类（例如生存于3亿6,500万年前的棘螈与鱼石螈）之间的物种。因为提塔利克鱼同时具有鱼类及两生类的特征，所以发现者尼尔·苏宾（Neil Shubin）认为牠属于四足形类。

Tiktaalik /tɪkˈtɑːlᵻk/ is a monospecific genus of extinct sarcopterygian (lobe-finned fish) from the late Devonian period, about 375 Ma (million years) ago, having many features akin to those of tetrapods (four-legged animals).

Tiktaalik has a possibility of being a representative of the evolutionary transition from fish to amphibians. It is an example from several lines of ancient sarcopterygian fish developing adaptations to the oxygen-poor shallow-water habitats of its time, environmental conditions which are thought to have led to the evolution of tetrapods.