Perhaps invertebrates built these holes while feeding in silt or as shelter or to lay their eggs. However, the reason for the appearance of such unusual holes is still unclear.
Researchers led by Julia D. Sigwart of the Seckenberg Museum discovered similar structures found in the Pacific Ocean. During the AleutBio expedition, the researchers used a remote camera equipped with a camera to study the deep-sea fauna. The camera recorded rows of holes at a depth of about 3,500 meters, similar to those found in the Atlantic.
The researchers suggested that the builders of the nest were amphipods, as other animals near the rows were either too large or unsuitable for digging such nests.
Amphipods nest with gnatopods, possibly the first pair of pectoral legs commonly used for catching prey. However, the exact species of nest-building amphipods have yet to be determined.
Source: Ferra
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