# The cleaning secret behind the Natural History Museum's most terrifying diorama How the deep ocean battle between giant squid and sperm whale gets maintained - **Source:** [Popular Science](https://brifing.si/source/cc3d313a-759c-4802-b881-fc8585f35ef9) - **Published:** 2026-08-13 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/b0bc50db-3547-4532-98e0-78b2b88fd041 ## The museum's iconic exhibit The sperm whale and giant squid diorama at the American Museum of Natural History is a dramatic display that surprises visitors. Intermittent lighting in the dark environment reveals sharp teeth and reddish tentacles. This exhibit depicts one of nature's most mysterious predator-prey relationships. Unlike other exhibits, it lacks protective glass. The open design presents unique maintenance challenges. ## Cleaning challenges Cleaning the open diorama is particularly demanding. Maintaining every nook and cranny can take one person up to four hours. Museum maintenance supervisor Janet Spiller uses a specialized backpack vacuum with fiber extensions. A recently shared social media video shows this meticulous process. The dark design was intentionally chosen to replicate deep ocean conditions with zero sunlight. ## Battle of the deep Sperm whales (Physeter macrocephalus) dive over 6,500 feet (1,981 meters) - equivalent to 4.5 Empire State Buildings - to hunt giant squid (Architeuthis dux). They can remain submerged for more than 60 minutes in pursuit. This deep ocean struggle represents one of nature's most impressive encounters. The diorama captures this dramatic moment with remarkable accuracy. ## Scientific evidence Evidence of this oceanic clash comes from circular marks on sperm whales' skin and stomach contents. These marks are believed to be from giant squid suckers. Additionally, squid beaks found in whale stomachs provide concrete proof of this predator-prey relationship. Scientists first documented giant squid in their natural habitat only in 2005, leaving many mysteries about these deep-sea creatures. ## Visitor misconception The diorama's intentionally dark design initially led some early visitors to believe the exhibit was empty. Reflections in the dark interior created mirror effects. Museum officials chose this design to accurately represent the sunlight-deprived conditions of the deep ocean. This specialized lighting enhances the exhibit's realism while presenting unique conservation challenges. ## Maintenance details Diorama maintenance goes far beyond routine cleaning. Special equipment is used to meticulously clean every detail. Dust and dirt accumulation is regularly monitored to preserve the realistic appearance. The maintenance team receives specialized training for this delicate work. Museum visitors rarely get to see these background efforts that keep the exhibit pristine. ## Scientific curiosity Giant squid still hold many mysteries. They were first observed in their natural habitat only in 2005. Many questions remain unanswered about these enigmatic deep-sea creatures. Their deadly dance with sperm whales continues to fascinate scientists. The museum exhibit serves as an important tool for public education about these rarely seen interactions. ## Educational and conservation role This diorama serves not just aesthetic but educational purposes. It shows visitors the complexity of deep ocean ecosystems. Understanding marine life struggles supports conservation efforts. The museum aims to increase nature awareness through such exhibits. The meticulous maintenance work ensures the sustainability of this educational mission while preserving an important scientific display. ## Sources covering this story - https://www.popsci.com/science/sperm-whale-giant-squid-diorama-cleaning/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._