Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to identify different betta fish [title] Examine the short length a betta fish's tail. [step] Betta fish have a variety of tail types. One simple way to identify a betta fish is by the length of its tail.

Ending1: But, if one has a short length, it is more likely to be male than female. To differentiate a female betta from a male, look for a tail length equal to the length of a male betta. Ending2: Its length is dependent on its dorsal fin, which is the part of the fish's body that follows the compass's surface line, which mimics the ocean's wave pattern. [substeps] The length of a betta's tail can also change depending on its size. Ending3: Short tails are common in wild type bettas, as well as bettas that are bred to fight. [substeps] Short-finned bettas, which are also called plakats, are sometimes bred to have d-shaped tails. Ending4: Their width is usually two to three times longer than the length of their body and is half the length of their head. [substeps] Thus, if a betta has twice the length of a human's tail, it's generally a good sign that it is a good tank mate.

Answer format: ending1/ending2/ending3/ending4