These two poems are immediate neighbours and concern the same subject, a colossal, millipede-like sea-monster called the scolopendra. The modern genus scolopendra includes various large tropical centipedes, but none nearly so large as their ancient namesake. 6.223 is in the book, but 6.222 is newly done for this blog post.
A note on weather: the constellation Orion rises in July and sets in November, and was anciently associated with storms in both seasons. Virgil in Aeneid 1 has Orion stir up a sudden storm that drives the refugee Trojans' ships onto reefs, just as the storm of Theodoridas' epigram casts the scolopendra onto the reefs of southern Italy:
Hic cursus fuit,
cum subitō adsurgēns flūctū nimbōsus Orīōn
in vada caeca tulit penitusque procācibus Austrīs
perque undās superante salō perque invia saxa
dispulit; hūc paucī vestrīs adnāvimus ōrīs. (1.534-8)Theodoridas (3rd century BC) was a poet of Syracuse, so Apulia ('Iapygia' in the Greek) was fairly local. Antipater was writing about a century later.
I reproduce Aelian's account of the scolopendra below the translations. He was a rhetorician writing in the third century AD, so the many-legged sea-monster had a good run, but it is not found in the modern Mediterranean; at some point it went away, to where all the good stories eventually go.