Presence of large colonies (>100cm) of the hydrocoral Millepora alcicornis in the coral reef of Tamandaré - Pernambuco, Brazil (Field surveys from Feb2017 to May 2019)

Underwater mapping of hydrocoral Millepora alcicornis was conducted from February 2017 to May 2019, as part of a conjoined, ongoing effort to map the benthic habitats and monitor the coral reefs of the area.Field survey was undertaken using photo and video transects and a diver-towed GPS (Garmin eTrex 20x) recording location data at 5 s intervals.Video recordings were undertaken by a patiently swimming diver using a GoPro coupled on top of a one-meter handle. To enable the estimation of the size of the coral colonies, a measuring tape was attached to a PVC one-dimensional frame. The location of each coral colony was recorded by checking the timestamp of the specific photos and video frames containing the species and syncing it with a digital watch carefully synchronized with the towed GPS.Specimens of Millepora alcicornis were also classified by size. The table shows data related to the species' colonies larger than 100 cm.