Crocodile

Crocodiles can be found in various places:
 * Level 42 crocodiles live along southern coast of the Kharidian desert, to the east of Sophanem. These always drop bones with no other items.
 * Level 63 crocodiles inhabit the banks of the River Elid south of Pollnivneach, north of Sophanem, which has a bank for players who have completed the quest Contact!, and west of Nardah, which also has a bank. These hit for a maximum of 6 damage and always drop bones with no other items.
 * These crocodiles also menace travelers at the southern Pollnivneach magic carpet, and can be killed there without water or heat issues.
 * Larger level 89 crocodiles infest the southern coast of the Kharidian desert, to the east of Sophanem. These hit a maximum of 12 damage. They drop big bones and as such occasionally drop Long bones and Curved bones.

They can be assigned as Slayer tasks.

All crocodiles are found in areas where Desert heat is present and thus require players to have a Water source to avoid taking damage from thirst.

Strategy
Jordan owns
 * A stabbing weapon is most effective at puncturing their thick scaly hides.
 * Waterskins or an Enchanted water tiara are needed as they are in the desert. Waterskins can be refilled in various places, such as in Pollnivneach at the Fountain/Well using a Bucket bought from the General Store.
 * Desert clothing slows the rate at which desert heat affects you. However, you will be hit much more often than if you wear good armour.
 * If you get low on health, collect Desert Goat Horns by killing Desert Goats and sell them to a General store then use this money to buy Kebabs from the Pollnivneach shop.
 * Take about 200gp so that you can buy Kebabs for Health.
 * Food can be obtained by searching banana trees along the banks of the river, though these are sometimes empty.
 * If you decide to take on the level 63 crocodiles by the river for your crocodile slayer assignment, bring a bow and sufficient arrows (400+), because they are frequently on the other side of the river. The level 89 crocodiles can be fought with melee without much incident, but they do hit hard for their level.
 * If a crocodile is killed while partially or fully in water, the bones will not be dropped.
 * You can hide at the carpet man and range them they won't come to you but sometimes you will be pulled away from him if you have auto retaliate on.
 * The Enchanted water tiara, which can be made after completing the Dealing with Scabaras quest, can be stocked up with water runes and used as a water source against desert heat. This item makes slaying crocodiles an easier task, as players can wear good armour and stay a long time in the desert. It can also be used with Guthan's set. Simply wear the tiara most of the time and switch to the Guthan's helm when necessary to heal.

Trivia

 * Many players do not like being assigned crocodiles as slayer tasks, as the combination of poor drops and desert heat makes the task somewhat difficult and rather unrewarding.