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Avšak krokodíl morský, ktorý sa tiež živí potravou pochádzajúcou zo súše, môže dosahovať ešte väčšiu dĺžku i hmotnosť ako medveď biely. Dospelý krokodíl morský, samec, ktorý je mnohonásobne väčší ako samica, dosahuje priemernú váhu 410 až 770 kg a dĺžku (vrátane chvosta) 4 až 5 m,[1]:2562:313 pričom najmenší jedinci môžu byť dlhí iba 2,1 m a vážiť dokonca len 32 kg,[1] a naopak veľmi zdatní (najstarší) samci môžu byť dlhí takmer 7 m a vážiť zrejme aj 1 100 kg, alebo údajne až 2 000 kg.[2]:313[3][4][5]
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