a bull alligator

• 1803, 988, -18 (seen once) (1 of 2 spawns here)
• 1711, 1292, -26 (seen once)
• 1437, 660, -32 (seen once)
• 1439, 428, -29 (seen once) (1 of 2 spawns here)
• 1443, 400, -29 (seen once)
• 976, 536, -31 (seen once)
• 818, 1236, -27 (seen once)
• 782, 1235, -28 (seen once) (1 of 2 spawns here)
• 534, 568, -29 (seen once)
• 1857, 565, -36 (seen once)
• 1143, 1536, -25 (seen once) (1 of 3 spawns here)
• 1847, 893, -15 (seen once)
• 943, 203, -32 (seen once)
• 1178, 98, -41 (seen once)
• 2099, 1694, -27 (seen once) (1 of 2 spawns here)
• 2050, 69, -30 (seen once)
• 2059, -3, -40 (seen once) (1 of 3 spawns here)
• 1650, 85, -23 (seen once) (1 of 2 spawns here)
• 1075, 1297, -30 (seen once) (1 of 3 spawns here)
• 838, 144, -18 (seen once)
• 1477, 731, -35 (seen once)
• 1725, 261, -12 (seen once)
• 1130, 521, -19 (seen once)
• 992, 1065, -28 (seen once)
• 943, 978, -22 (seen once) (1 of 3 spawns here)
• 1165, 278, -31 (seen once)
• 758, 1166, -29 (seen once)
• 520, 592, -36 (seen once)
• 2043, 1371, -29 (seen once)
• 1231, 113, -32 (seen once)

As /loc gives them: Y, X, Z, the most used first; nearby spawns share a spot, and one seen in a single visit may be where the mob had been pulled to.