The meaning here depends on the action. If you merely observed a crocodile, it's a warning that untrustworthy associates may be trying to influence you adversely; stand firm. If the crocodile chased or threatened you, good luck is sure to follow, unless it caught or injured you, in which case you are in for a painful disappointment or business reverse. However, if you killed a crocodile or saw a dead one, you will have success beyond your wildest expectations.